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Web.Admin/2014/wordpress/wp-includes/query.php

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<?php
/**
 * WordPress Query API
 *
 * The query API attempts to get which part of WordPress to the user is on. It
 * also provides functionality to getting URL query information.
 *
 * @link http://codex.wordpress.org/The_Loop More information on The Loop.
 *
 * @package WordPress
 * @subpackage Query
 */

/**
 * Retrieve variable in the WP_Query class.
 *
 * @see WP_Query::get()
 * @since 1.5.0
 * @uses $wp_query
 *
 * @param string $var The variable key to retrieve.
 * @return mixed
 */
function get_query_var($var) {
    global $wp_query;

    return $wp_query->get($var);
}

/**
 * Set query variable.
 *
 * @see WP_Query::set()
 * @since 2.2.0
 * @uses $wp_query
 *
 * @param string $var Query variable key.
 * @param mixed $value
 * @return null
 */
function set_query_var($var, $value) {
    global $wp_query;

    return $wp_query->set($var, $value);
}

/**
 * Setup The Loop with query parameters.
 *
 * This will override the current WordPress Loop and shouldn't be used more than
 * once. This must not be used within the WordPress Loop.
 *
 * @since 1.5.0
 * @uses $wp_query
 *
 * @param string $query
 * @return array List of posts
 */
function &query_posts($query) {
    unset($GLOBALS['wp_query']);
    $GLOBALS['wp_query'] =& new WP_Query();
    return $GLOBALS['wp_query']->query($query);
}

/**
 * Destroy the previous query and setup a new query.
 *
 * This should be used after {@link query_posts()} and before another {@link
 * query_posts()}. This will remove obscure bugs that occur when the previous
 * wp_query object is not destroyed properly before another is setup.
 *
 * @since 2.3.0
 * @uses $wp_query
 */
function wp_reset_query() {
    unset($GLOBALS['wp_query']);
    $GLOBALS['wp_query'] =& $GLOBALS['wp_the_query'];
    global $wp_query;
    if ( !empty($wp_query->post) ) {
        $GLOBALS['post'] = $wp_query->post;
        setup_postdata($wp_query->post);
    }
}

/*
 * Query type checks.
 */

/**
 * Is query requesting an archive page.
 *
 * @since 1.5.0
 * @uses $wp_query
 *
 * @return bool True if page is archive.
 */
function is_archive () {
    global $wp_query;

    return $wp_query->is_archive;
}

/**
 * Is query requesting an attachment page.
 *
 * @since 2.0.0
 * @uses $wp_query
 *
 * @return bool True if page is attachment.
 */
function is_attachment () {
    global $wp_query;

    return $wp_query->is_attachment;
}

/**
 * Is query requesting an author page.
 *
 * If the $author parameter is specified then the check will be expanded to
 * include whether the queried author matches the one given in the parameter.
 * You can match against integers and against strings.
 *
 * If matching against an integer, the ID should be used of the author for the
 * test. If the $author is an ID and matches the author page user ID, then
 * 'true' will be returned.
 *
 * If matching against strings, then the test will be matched against both the
 * nickname and user nicename and will return true on success.
 *
 * @since 1.5.0
 * @uses $wp_query
 *
 * @param string|int $author Optional. Is current page this author.
 * @return bool True if page is author or $author (if set).
 */
function is_author ($author = '') {
    global $wp_query;

    if ( !$wp_query->is_author )
        return false;

    if ( empty($author) )
        return true;

    $author_obj = $wp_query->get_queried_object();

    $author = (array) $author;

    if ( in_array( $author_obj->ID, $author ) )
        return true;
    elseif ( in_array( $author_obj->nickname, $author ) )
        return true;
    elseif ( in_array( $author_obj->user_nicename, $author ) )
        return true;

    return false;
}

/**
 * Whether current page query contains a category name or given category name.
 *
 * The category list can contain category IDs, names, or category slugs. If any
 * of them are part of the query, then it will return true.
 *
 * @since 1.5.0
 * @uses $wp_query
 *
 * @param string|array $category Optional.
 * @return bool
 */
function is_category ($category = '') {
    global $wp_query;

    if ( !$wp_query->is_category )
        return false;

    if ( empty($category) )
        return true;

    $cat_obj = $wp_query->get_queried_object();

    $category = (array) $category;

    if ( in_array( $cat_obj->term_id, $category ) )
        return true;
    elseif ( in_array( $cat_obj->name, $category ) )
        return true;
    elseif ( in_array( $cat_obj->slug, $category ) )
        return true;

    return false;
}

/**
 * Whether the current page query has the given tag slug or contains tag.
 *
 * @since 2.3.0
 * @uses $wp_query
 *
 * @param string|array $slug Optional. Single tag or list of tags to check for.
 * @return bool
 */
function is_tag( $slug = '' ) {
    global $wp_query;

    if ( !$wp_query->is_tag )
        return false;

    if ( empty( $slug ) )
        return true;

    $tag_obj = $wp_query->get_queried_object();

    $slug = (array) $slug;

    if ( in_array( $tag_obj->slug, $slug ) )
        return true;

    return false;
}

/**
 * Whether the current page query has the given taxonomy slug or contains taxonomy.
 *
 * @since 2.5.0
 * @uses $wp_query
 *
 * @param string|array $slug Optional. Slug or slugs to check in current query.
 * @return bool
 */
function is_tax( $slug = '' ) {
    global $wp_query;

    if ( !$wp_query->is_tax )
        return false;

    if ( empty($slug) )
        return true;

    return in_array( get_query_var('taxonomy'), (array) $slug );
}

/**
 * Whether the current URL is within the comments popup window.
 *
 * @since 1.5.0
 * @uses $wp_query
 *
 * @return bool
 */
function is_comments_popup () {
    global $wp_query;

    return $wp_query->is_comments_popup;
}

/**
 * Whether current URL is based on a date.
 *
 * @since 1.5.0
 * @uses $wp_query
 *
 * @return bool
 */
function is_date () {
    global $wp_query;

    return $wp_query->is_date;
}

/**
 * Whether current blog URL contains a day.
 *
 * @since 1.5.0
 * @uses $wp_query
 *
 * @return bool
 */
function is_day () {
    global $wp_query;

    return $wp_query->is_day;
}

/**
 * Whether current page query is feed URL.
 *
 * @since 1.5.0
 * @uses $wp_query
 *
 * @return bool
 */
function is_feed () {
    global $wp_query;

    return $wp_query->is_feed;
}

/**
 * Whether current page query is the front of the site.
 *
 * @since 2.5.0
 * @uses is_home()
 * @uses get_option()
 *
 * @return bool True, if front of site.
 */
function is_front_page () {
    // most likely case
    if ( 'posts' == get_option('show_on_front') && is_home() )
        return true;
    elseif ( 'page' == get_option('show_on_front') && get_option('page_on_front') && is_page(get_option('page_on_front')) )
        return true;
    else
        return false;
}

/**
 * Whether current page view is the blog homepage.
 *
 * @since 1.5.0
 * @uses $wp_query
 *
 * @return bool True if blog view homepage.
 */
function is_home () {
    global $wp_query;

    return $wp_query->is_home;
}

/**
 * Whether current page query contains a month.
 *
 * @since 1.5.0
 * @uses $wp_query
 *
 * @return bool
 */
function is_month () {
    global $wp_query;

    return $wp_query->is_month;
}

/**
 * Whether query is page or contains given page(s).
 *
 * Calls the function without any parameters will only test whether the current
 * query is of the page type. Either a list or a single item can be tested
 * against for whether the query is a page and also is the value or one of the
 * values in the page parameter.
 *
 * The parameter can contain the page ID, page title, or page name. The
 * parameter can also be an array of those three values.
 *
 * @since 1.5.0
 * @uses $wp_query
 *
 * @param mixed $page Either page or list of pages to test against.
 * @return bool
 */
function is_page ($page = '') {
    global $wp_query;

    if ( !$wp_query->is_page )
        return false;

    if ( empty($page) )
        return true;

    $page_obj = $wp_query->get_queried_object();

    $page = (array) $page;

    if ( in_array( $page_obj->ID, $page ) )
        return true;
    elseif ( in_array( $page_obj->post_title, $page ) )
        return true;
    else if ( in_array( $page_obj->post_name, $page ) )
        return true;

    return false;
}

/**
 * Whether query contains multiple pages for the results.
 *
 * @since 1.5.0
 * @uses $wp_query
 *
 * @return bool
 */
function is_paged () {
    global $wp_query;

    return $wp_query->is_paged;
}

/**
 * Whether the current page was created by a plugin.
 *
 * The plugin can set this by using the global $plugin_page and setting it to
 * true.
 *
 * @since 1.5.0
 * @global bool $plugin_page Used by plugins to tell the query that current is a plugin page.
 *
 * @return bool
 */
function is_plugin_page() {
    global $plugin_page;

    if ( isset($plugin_page) )
        return true;

    return false;
}

/**
 * Whether the current query is preview of post or page.
 *
 * @since 2.0.0
 * @uses $wp_query
 *
 * @return bool
 */
function is_preview() {
    global $wp_query;

    return $wp_query->is_preview;
}

/**
 * Whether the current query post is robots.
 *
 * @since 2.1.0
 * @uses $wp_query
 *
 * @return bool
 */
function is_robots() {
    global $wp_query;

    return $wp_query->is_robots;
}

/**
 * Whether current query is the result of a user search.
 *
 * @since 1.5.0
 * @uses $wp_query
 *
 * @return bool
 */
function is_search () {
    global $wp_query;

    return $wp_query->is_search;
}

/**
 * Whether the current page query is single page.
 *
 * The parameter can contain the post ID, post title, or post name. The
 * parameter can also be an array of those three values.
 *
 * This applies to other post types, attachments, pages, posts. Just means that
 * the current query has only a single object.
 *
 * @since 1.5.0
 * @uses $wp_query
 *
 * @param mixed $post Either post or list of posts to test against.
 * @return bool
 */
function is_single ($post = '') {
    global $wp_query;

    if ( !$wp_query->is_single )
        return false;

    if ( empty( $post) )
        return true;

    $post_obj = $wp_query->get_queried_object();

    $post = (array) $post;

    if ( in_array( $post_obj->ID, $post ) )
        return true;
    elseif ( in_array( $post_obj->post_title, $post ) )
        return true;
    elseif ( in_array( $post_obj->post_name, $post ) )
        return true;

    return false;
}

/**
 * Whether is single post, is a page, or is an attachment.
 *
 * @since 1.5.0
 * @uses $wp_query
 *
 * @return bool
 */
function is_singular() {
    global $wp_query;

    return $wp_query->is_singular;
}

/**
 * Whether the query contains a time.
 *
 * @since 1.5.0
 * @uses $wp_query
 *
 * @return bool
 */
function is_time () {
    global $wp_query;

    return $wp_query->is_time;
}

/**
 * Whether the query is a trackback.
 *
 * @since 1.5.0
 * @uses $wp_query
 *
 * @return bool
 */
function is_trackback () {
    global $wp_query;

    return $wp_query->is_trackback;
}

/**
 * Whether the query contains a year.
 *
 * @since 1.5.0
 * @uses $wp_query
 *
 * @return bool
 */
function is_year () {
    global $wp_query;

    return $wp_query->is_year;
}

/**
 * Whether current page query is a 404 and no results for WordPress query.
 *
 * @since 1.5.0
 * @uses $wp_query
 *
 * @return bool True, if nothing is found matching WordPress Query.
 */
function is_404 () {
    global $wp_query;

    return $wp_query->is_404;
}

/*
 * The Loop.  Post loop control.
 */

/**
 * Whether current WordPress query has results to loop over.
 *
 * @see WP_Query::have_posts()
 * @since 1.5.0
 * @uses $wp_query
 *
 * @return bool
 */
function have_posts() {
    global $wp_query;

    return $wp_query->have_posts();
}

/**
 * Whether the caller is in the Loop.
 *
 * @since 2.0.0
 * @uses $wp_query
 *
 * @return bool True if caller is within loop, false if loop hasn't started or ended.
 */
function in_the_loop() {
    global $wp_query;

    return $wp_query->in_the_loop;
}

/**
 * Rewind the loop posts.
 *
 * @see WP_Query::rewind_posts()
 * @since 1.5.0
 * @uses $wp_query
 *
 * @return null
 */
function rewind_posts() {
    global $wp_query;

    return $wp_query->rewind_posts();
}

/**
 * Iterate the post index in the loop.
 *
 * @see WP_Query::the_post()
 * @since 1.5.0
 * @uses $wp_query
 */
function the_post() {
    global $wp_query;

    $wp_query->the_post();
}

/*
 * Comments loop.
 */

/**
 * Whether there are comments to loop over.
 *
 * @see WP_Query::have_comments()
 * @since 2.2.0
 * @uses $wp_query
 *
 * @return bool
 */
function have_comments() {
    global $wp_query;
    return $wp_query->have_comments();
}

/**
 * Iterate comment index in the comment loop.
 *
 * @see WP_Query::the_comment()
 * @since 2.2.0
 * @uses $wp_query
 *
 * @return object
 */
function the_comment() {
    global $wp_query;
    return $wp_query->the_comment();
}

/*
 * WP_Query
 */

/**
 * The WordPress Query class.
 *
 * @link http://codex.wordpress.org/Function_Reference/WP_Query Codex page.
 *
 * @since 1.5.0
 */
class WP_Query {

    /**
     * Query string
     *
     * @since 1.5.0
     * @access public
     * @var string
     */
    var $query;

    /**
     * Query search variables set by the user.
     *
     * @since 1.5.0
     * @access public
     * @var array
     */
    var $query_vars = array();

    /**
     * Holds the data for a single object that is queried.
     *
     * Holds the contents of a post, page, category, attachment.
     *
     * @since 1.5.0
     * @access public
     * @var object|array
     */
    var $queried_object;

    /**
     * The ID of the queried object.
     *
     * @since 1.5.0
     * @access public
     * @var int
     */
    var $queried_object_id;

    /**
     * Get post database query.
     *
     * @since 2.0.1
     * @access public
     * @var string
     */
    var $request;

    /**
     * List of posts.
     *
     * @since 1.5.0
     * @access public
     * @var array
     */
    var $posts;

    /**
     * The amount of posts for the current query.
     *
     * @since 1.5.0
     * @access public
     * @var int
     */
    var $post_count = 0;

    /**
     * Index of the current item in the loop.
     *
     * @since 1.5.0
     * @access public
     * @var int
     */
    var $current_post = -1;

    /**
     * Whether the loop has started and the caller is in the loop.
     *
     * @since 2.0.0
     * @access public
     * @var bool
     */
    var $in_the_loop = false;

    /**
     * The current post ID.
     *
     * @since 1.5.0
     * @access public
     * @var int
     */
    var $post;

    /**
     * The list of comments for current post.
     *
     * @since 2.2.0
     * @access public
     * @var array
     */
    var $comments;

    /**
     * The amount of comments for the posts.
     *
     * @since 2.2.0
     * @access public
     * @var int
     */
    var $comment_count = 0;

    /**
     * The index of the comment in the comment loop.
     *
     * @since 2.2.0
     * @access public
     * @var int
     */
    var $current_comment = -1;

    /**
     * Current comment ID.
     *
     * @since 2.2.0
     * @access public
     * @var int
     */
    var $comment;

    /**
     * Amount of posts if limit clause was not used.
     *
     * @since 2.1.0
     * @access public
     * @var int
     */
    var $found_posts = 0;

    /**
     * The amount of pages.
     *
     * @since 2.1.0
     * @access public
     * @var int
     */
    var $max_num_pages = 0;

    /**
     * The amount of comment pages.
     *
     * @since 2.7.0
     * @access public
     * @var int
     */
    var $max_num_comment_pages = 0;

    /**
     * Set if query is single post.
     *
     * @since 1.5.0
     * @access public
     * @var bool
     */
    var $is_single = false;

    /**
     * Set if query is preview of blog.
     *
     * @since 2.0.0
     * @access public
     * @var bool
     */
    var $is_preview = false;

    /**
     * Set if query returns a page.
     *
     * @since 1.5.0
     * @access public
     * @var bool
     */
    var $is_page = false;

    /**
     * Set if query is an archive list.
     *
     * @since 1.5.0
     * @access public
     * @var bool
     */
    var $is_archive = false;

    /**
     * Set if query is part of a date.
     *
     * @since 1.5.0
     * @access public
     * @var bool
     */
    var $is_date = false;

    /**
     * Set if query contains a year.
     *
     * @since 1.5.0
     * @access public
     * @var bool
     */
    var $is_year = false;

    /**
     * Set if query contains a month.
     *
     * @since 1.5.0
     * @access public
     * @var bool
     */
    var $is_month = false;

    /**
     * Set if query contains a day.
     *
     * @since 1.5.0
     * @access public
     * @var bool
     */
    var $is_day = false;

    /**
     * Set if query contains time.
     *
     * @since 1.5.0
     * @access public
     * @var bool
     */
    var $is_time = false;

    /**
     * Set if query contains an author.
     *
     * @since 1.5.0
     * @access public
     * @var bool
     */
    var $is_author = false;

    /**
     * Set if query contains category.
     *
     * @since 1.5.0
     * @access public
     * @var bool
     */
    var $is_category = false;

    /**
     * Set if query contains tag.
     *
     * @since 2.3.0
     * @access public
     * @var bool
     */
    var $is_tag = false;

    /**
     * Set if query contains taxonomy.
     *
     * @since 2.5.0
     * @access public
     * @var bool
     */
    var $is_tax = false;

    /**
     * Set if query was part of a search result.
     *
     * @since 1.5.0
     * @access public
     * @var bool
     */
    var $is_search = false;

    /**
     * Set if query is feed display.
     *
     * @since 1.5.0
     * @access public
     * @var bool
     */
    var $is_feed = false;

    /**
     * Set if query is comment feed display.
     *
     * @since 2.2.0
     * @access public
     * @var bool
     */
    var $is_comment_feed = false;

    /**
     * Set if query is trackback.
     *
     * @since 1.5.0
     * @access public
     * @var bool
     */
    var $is_trackback = false;

    /**
     * Set if query is blog homepage.
     *
     * @since 1.5.0
     * @access public
     * @var bool
     */
    var $is_home = false;

    /**
     * Set if query couldn't found anything.
     *
     * @since 1.5.0
     * @access public
     * @var bool
     */
    var $is_404 = false;

    /**
     * Set if query is within comments popup window.
     *
     * @since 1.5.0
     * @access public
     * @var bool
     */
    var $is_comments_popup = false;

    /**
     * Set if query is part of administration page.
     *
     * @since 1.5.0
     * @access public
     * @var bool
     */
    var $is_admin = false;

    /**
     * Set if query is an attachment.
     *
     * @since 2.0.0
     * @access public
     * @var bool
     */
    var $is_attachment = false;

    /**
     * Set if is single, is a page, or is an attachment.
     *
     * @since 2.1.0
     * @access public
     * @var bool
     */
    var $is_singular = false;

    /**
     * Set if query is for robots.
     *
     * @since 2.1.0
     * @access public
     * @var bool
     */
    var $is_robots = false;

    /**
     * Set if query contains posts.
     *
     * Basically, the homepage if the option isn't set for the static homepage.
     *
     * @since 2.1.0
     * @access public
     * @var bool
     */
    var $is_posts_page = false;

    /**
     * Resets query flags to false.
     *
     * The query flags are what page info WordPress was able to figure out.
     *
     * @since 2.0.0
     * @access private
     */
    function init_query_flags() {
        $this->is_single = false;
        $this->is_page = false;
        $this->is_archive = false;
        $this->is_date = false;
        $this->is_year = false;
        $this->is_month = false;
        $this->is_day = false;
        $this->is_time = false;
        $this->is_author = false;
        $this->is_category = false;
        $this->is_tag = false;
        $this->is_tax = false;
        $this->is_search = false;
        $this->is_feed = false;
        $this->is_comment_feed = false;
        $this->is_trackback = false;
        $this->is_home = false;
        $this->is_404 = false;
        $this->is_paged = false;
        $this->is_admin = false;
        $this->is_attachment = false;
        $this->is_singular = false;
        $this->is_robots = false;
        $this->is_posts_page = false;
    }

    /**
     * Initiates object properties and sets default values.
     *
     * @since 1.5.0
     * @access public
     */
    function init () {
        unset($this->posts);
        unset($this->query);
        $this->query_vars = array();
        unset($this->queried_object);
        unset($this->queried_object_id);
        $this->post_count = 0;
        $this->current_post = -1;
        $this->in_the_loop = false;

        $this->init_query_flags();
    }

    /**
     * Reparse the query vars.
     *
     * @since 1.5.0
     * @access public
     */
    function parse_query_vars() {
        $this->parse_query('');
    }

    /**
     * Fills in the query variables, which do not exist within the parameter.
     *
     * @since 2.1.0
     * @access public
     *
     * @param array $array Defined query variables.
     * @return array Complete query variables with undefined ones filled in empty.
     */
    function fill_query_vars($array) {
        $keys = array(
            'error'
            , 'm'
            , 'p'
            , 'post_parent'
            , 'subpost'
            , 'subpost_id'
            , 'attachment'
            , 'attachment_id'
            , 'name'
            , 'hour'
            , 'static'
            , 'pagename'
            , 'page_id'
            , 'second'
            , 'minute'
            , 'hour'
            , 'day'
            , 'monthnum'
            , 'year'
            , 'w'
            , 'category_name'
            , 'tag'
            , 'cat'
            , 'tag_id'
            , 'author_name'
            , 'feed'
            , 'tb'
            , 'paged'
            , 'comments_popup'
            , 'meta_key'
            , 'meta_value'
            , 'preview'
        );

        foreach ($keys as $key) {
            if ( !isset($array[$key]))
                $array[$key] = '';
        }

        $array_keys = array('category__in', 'category__not_in', 'category__and', 'post__in', 'post__not_in',
            'tag__in', 'tag__not_in', 'tag__and', 'tag_slug__in', 'tag_slug__and');

        foreach ( $array_keys as $key ) {
            if ( !isset($array[$key]))
                $array[$key] = array();
        }
        return $array;
    }

    /**
     * Parse a query string and set query type booleans.
     *
     * @since 1.5.0
     * @access public
     *
     * @param string|array $query
     */
    function parse_query ($query) {
        if ( !empty($query) || !isset($this->query) ) {
            $this->init();
            if ( is_array($query) )
                $this->query_vars = $query;
            else
                parse_str($query, $this->query_vars);
            $this->query = $query;
        }

        $this->query_vars = $this->fill_query_vars($this->query_vars);
        $qv = &$this->query_vars;

        if ( ! empty($qv['robots']) )
            $this->is_robots = true;

        $qv['p'] =  absint($qv['p']);
        $qv['page_id'] =  absint($qv['page_id']);
        $qv['year'] = absint($qv['year']);
        $qv['monthnum'] = absint($qv['monthnum']);
        $qv['day'] = absint($qv['day']);
        $qv['w'] = absint($qv['w']);
        $qv['m'] = absint($qv['m']);
        $qv['paged'] = absint($qv['paged']);
        $qv['cat'] = preg_replace( '|[^0-9,-]|', '', $qv['cat'] ); // comma separated list of positive or negative integers
        $qv['pagename'] = trim( $qv['pagename'] );
        $qv['name'] = trim( $qv['name'] );
        if ( '' !== $qv['hour'] ) $qv['hour'] = absint($qv['hour']);
        if ( '' !== $qv['minute'] ) $qv['minute'] = absint($qv['minute']);
        if ( '' !== $qv['second'] ) $qv['second'] = absint($qv['second']);

        // Compat.  Map subpost to attachment.
        if ( '' != $qv['subpost'] )
            $qv['attachment'] = $qv['subpost'];
        if ( '' != $qv['subpost_id'] )
            $qv['attachment_id'] = $qv['subpost_id'];

        $qv['attachment_id'] = absint($qv['attachment_id']);

        if ( ('' != $qv['attachment']) || !empty($qv['attachment_id']) ) {
            $this->is_single = true;
            $this->is_attachment = true;
        } elseif ( '' != $qv['name'] ) {
            $this->is_single = true;
        } elseif ( $qv['p'] ) {
            $this->is_single = true;
        } elseif ( ('' !== $qv['hour']) && ('' !== $qv['minute']) &&('' !== $qv['second']) && ('' != $qv['year']) && ('' != $qv['monthnum']) && ('' != $qv['day']) ) {
            // If year, month, day, hour, minute, and second are set, a single
            // post is being queried.
            $this->is_single = true;
        } elseif ( '' != $qv['static'] || '' != $qv['pagename'] || !empty($qv['page_id']) ) {
            $this->is_page = true;
            $this->is_single = false;
        } elseif ( !empty($qv['s']) ) {
            $this->is_search = true;
        } else {
        // Look for archive queries.  Dates, categories, authors.

            if ( '' !== $qv['second'] ) {
                $this->is_time = true;
                $this->is_date = true;
            }

            if ( '' !== $qv['minute'] ) {
                $this->is_time = true;
                $this->is_date = true;
            }

            if ( '' !== $qv['hour'] ) {
                $this->is_time = true;
                $this->is_date = true;
            }

            if ( $qv['day'] ) {
                if (! $this->is_date) {
                    $this->is_day = true;
                    $this->is_date = true;
                }
            }

            if ( $qv['monthnum'] ) {
                if (! $this->is_date) {
                    $this->is_month = true;
                    $this->is_date = true;
                }
            }

            if ( $qv['year'] ) {
                if (! $this->is_date) {
                    $this->is_year = true;
                    $this->is_date = true;
                }
            }

            if ( $qv['m'] ) {
                $this->is_date = true;
                if (strlen($qv['m']) > 9) {
                    $this->is_time = true;
                } else if (strlen($qv['m']) > 7) {
                    $this->is_day = true;
                } else if (strlen($qv['m']) > 5) {
                    $this->is_month = true;
                } else {
                    $this->is_year = true;
                }
            }

            if ('' != $qv['w']) {
                $this->is_date = true;
            }

            if ( empty($qv['cat']) || ($qv['cat'] == '0') ) {
                $this->is_category = false;
            } else {
                if (strpos($qv['cat'], '-') !== false) {
                    $this->is_category = false;
                } else {
                    $this->is_category = true;
                }
            }

            if ( '' != $qv['category_name'] ) {
                $this->is_category = true;
            }

            if ( !is_array($qv['category__in']) || empty($qv['category__in']) ) {
                $qv['category__in'] = array();
            } else {
                $qv['category__in'] = array_map('absint', $qv['category__in']);
                $this->is_category = true;
            }

            if ( !is_array($qv['category__not_in']) || empty($qv['category__not_in']) ) {
                $qv['category__not_in'] = array();
            } else {
                $qv['category__not_in'] = array_map('absint', $qv['category__not_in']);
            }

            if ( !is_array($qv['category__and']) || empty($qv['category__and']) ) {
                $qv['category__and'] = array();
            } else {
                $qv['category__and'] = array_map('absint', $qv['category__and']);
                $this->is_category = true;
            }

            if (  '' != $qv['tag'] )
                $this->is_tag = true;

            $qv['tag_id'] = absint($qv['tag_id']);
            if (  !empty($qv['tag_id']) )
                $this->is_tag = true;

            if ( !is_array($qv['tag__in']) || empty($qv['tag__in']) ) {
                $qv['tag__in'] = array();
            } else {
                $qv['tag__in'] = array_map('absint', $qv['tag__in']);
                $this->is_tag = true;
            }

            if ( !is_array($qv['tag__not_in']) || empty($qv['tag__not_in']) ) {
                $qv['tag__not_in'] = array();
            } else {
                $qv['tag__not_in'] = array_map('absint', $qv['tag__not_in']);
            }

            if ( !is_array($qv['tag__and']) || empty($qv['tag__and']) ) {
                $qv['tag__and'] = array();
            } else {
                $qv['tag__and'] = array_map('absint', $qv['tag__and']);
                $this->is_category = true;
            }

            if ( !is_array($qv['tag_slug__in']) || empty($qv['tag_slug__in']) ) {
                $qv['tag_slug__in'] = array();
            } else {
                $qv['tag_slug__in'] = array_map('sanitize_title', $qv['tag_slug__in']);
                $this->is_tag = true;
            }

            if ( !is_array($qv['tag_slug__and']) || empty($qv['tag_slug__and']) ) {
                $qv['tag_slug__and'] = array();
            } else {
                $qv['tag_slug__and'] = array_map('sanitize_title', $qv['tag_slug__and']);
                $this->is_tag = true;
            }

            if ( empty($qv['taxonomy']) || empty($qv['term']) ) {
                $this->is_tax = false;
                foreach ( $GLOBALS['wp_taxonomies'] as $taxonomy => $t ) {
                    if ( $t->query_var && isset($qv[$t->query_var]) && '' != $qv[$t->query_var] ) {
                        $qv['taxonomy'] = $taxonomy;
                        $qv['term'] = $qv[$t->query_var];
                        $this->is_tax = true;
                        break;
                    }
                }
            } else {
                $this->is_tax = true;
            }

            if ( empty($qv['author']) || ($qv['author'] == '0') ) {
                $this->is_author = false;
            } else {
                $this->is_author = true;
            }

            if ( '' != $qv['author_name'] ) {
                $this->is_author = true;
            }

            if ( ($this->is_date || $this->is_author || $this->is_category || $this->is_tag || $this->is_tax) )
                $this->is_archive = true;
        }

        if ( '' != $qv['feed'] )
            $this->is_feed = true;

        if ( '' != $qv['tb'] )
            $this->is_trackback = true;

        if ( '' != $qv['paged'] && ( intval($qv['paged']) > 1 ) )
            $this->is_paged = true;

        if ( '' != $qv['comments_popup'] )
            $this->is_comments_popup = true;

        // if we're previewing inside the write screen
        if ('' != $qv['preview'])
            $this->is_preview = true;

        if ( is_admin() )
            $this->is_admin = true;

        if ( false !== strpos($qv['feed'], 'comments-') ) {
            $qv['feed'] = str_replace('comments-', '', $qv['feed']);
            $qv['withcomments'] = 1;
        }

        $this->is_singular = $this->is_single || $this->is_page || $this->is_attachment;

        if ( $this->is_feed && ( !empty($qv['withcomments']) || ( empty($qv['withoutcomments']) && $this->is_singular ) ) )
            $this->is_comment_feed = true;

        if ( !( $this->is_singular || $this->is_archive || $this->is_search || $this->is_feed || $this->is_trackback || $this->is_404 || $this->is_admin || $this->is_comments_popup || $this->is_robots ) )
            $this->is_home = true;

        // Correct is_* for page_on_front and page_for_posts
        if ( $this->is_home && ( empty($this->query) || $qv['preview'] == 'true' ) && 'page' == get_option('show_on_front') && get_option('page_on_front') ) {
            $this->is_page = true;
            $this->is_home = false;
            $qv['page_id'] = get_option('page_on_front');
        }

        if ( '' != $qv['pagename'] ) {
            $this->queried_object =& get_page_by_path($qv['pagename']);
            if ( !empty($this->queried_object) )
                $this->queried_object_id = (int) $this->queried_object->ID;
            else
                unset($this->queried_object);

            if  ( 'page' == get_option('show_on_front') && isset($this->queried_object_id) && $this->queried_object_id == get_option('page_for_posts') ) {
                $this->is_page = false;
                $this->is_home = true;
                $this->is_posts_page = true;
            }
        }

        if ( $qv['page_id'] ) {
            if  ( 'page' == get_option('show_on_front') && $qv['page_id'] == get_option('page_for_posts') ) {
                $this->is_page = false;
                $this->is_home = true;
                $this->is_posts_page = true;
            }
        }

        if ( !empty($qv['post_type']) )    {
            if(is_array($qv['post_type']))
                $qv['post_type'] = array_map('sanitize_user', $qv['post_type'], array(true));
            else
                $qv['post_type'] = sanitize_user($qv['post_type'], true);
        }

        if ( !empty($qv['post_status']) )
            $qv['post_status'] = preg_replace('|[^a-z0-9_,-]|', '', $qv['post_status']);

        if ( $this->is_posts_page && ( ! isset($qv['withcomments']) || ! $qv['withcomments'] ) )
            $this->is_comment_feed = false;

        $this->is_singular = $this->is_single || $this->is_page || $this->is_attachment;
        // Done correcting is_* for page_on_front and page_for_posts

        if ('404' == $qv['error'])
            $this->set_404();

        if ( !empty($query) )
            do_action_ref_array('parse_query', array(&$this));
    }

    /**
     * Sets the 404 property and saves whether query is feed.
     *
     * @since 2.0.0
     * @access public
     */
    function set_404() {
        $is_feed = $this->is_feed;

        $this->init_query_flags();
        $this->is_404 = true;

        $this->is_feed = $is_feed;
    }

    /**
     * Retrieve query variable.
     *
     * @since 1.5.0
     * @access public
     *
     * @param string $query_var Query variable key.
     * @return mixed
     */
    function get($query_var) {
        if (isset($this->query_vars[$query_var])) {
            return $this->query_vars[$query_var];
        }

        return '';
    }

    /**
     * Set query variable.
     *
     * @since 1.5.0
     * @access public
     *
     * @param string $query_var Query variable key.
     * @param mixed $value Query variable value.
     */
    function set($query_var, $value) {
        $this->query_vars[$query_var] = $value;
    }

    /**
     * Retrieve the posts based on query variables.
     *
     * There are a few filters and actions that can be used to modify the post
     * database query.
     *
     * @since 1.5.0
     * @access public
     * @uses do_action_ref_array() Calls 'pre_get_posts' hook before retrieving posts.
     *
     * @return array List of posts.
     */
    function &get_posts() {
        global $wpdb, $user_ID;

        do_action_ref_array('pre_get_posts', array(&$this));

        // Shorthand.
        $q = &$this->query_vars;

        $q = $this->fill_query_vars($q);

        // First let's clear some variables
        $distinct = '';
        $whichcat = '';
        $whichauthor = '';
        $whichmimetype = '';
        $where = '';
        $limits = '';
        $join = '';
        $search = '';
        $groupby = '';
        $fields = "$wpdb->posts.*";
        $post_status_join = false;
        $page = 1;

        if ( !isset($q['caller_get_posts']) )
            $q['caller_get_posts'] = false;

        if ( !isset($q['suppress_filters']) )
            $q['suppress_filters'] = false;

        if ( !isset($q['post_type']) ) {
            if ( $this->is_search )
                $q['post_type'] = 'any';
            else
                $q['post_type'] = '';
        }
        $post_type = $q['post_type'];
        if ( !isset($q['posts_per_page']) || $q['posts_per_page'] == 0 )
            $q['posts_per_page'] = get_option('posts_per_page');
        if ( isset($q['showposts']) && $q['showposts'] ) {
            $q['showposts'] = (int) $q['showposts'];
            $q['posts_per_page'] = $q['showposts'];
        }
        if ( (isset($q['posts_per_archive_page']) && $q['posts_per_archive_page'] != 0) && ($this->is_archive || $this->is_search) )
            $q['posts_per_page'] = $q['posts_per_archive_page'];
        if ( !isset($q['nopaging']) ) {
            if ($q['posts_per_page'] == -1) {
                $q['nopaging'] = true;
            } else {
                $q['nopaging'] = false;
            }
        }
        if ( $this->is_feed ) {
            $q['posts_per_page'] = get_option('posts_per_rss');
            $q['nopaging'] = false;
        }
        $q['posts_per_page'] = (int) $q['posts_per_page'];
        if ( $q['posts_per_page'] < -1 )
            $q['posts_per_page'] = abs($q['posts_per_page']);
        else if ( $q['posts_per_page'] == 0 )
            $q['posts_per_page'] = 1;

        if ( !isset($q['comments_per_page']) || $q['comments_per_page'] == 0 )
            $q['comments_per_page'] = get_option('comments_per_page');

        if ( $this->is_home && (empty($this->query) || $q['preview'] == 'true') && ( 'page' == get_option('show_on_front') ) && get_option('page_on_front') ) {
            $this->is_page = true;
            $this->is_home = false;
            $q['page_id'] = get_option('page_on_front');
        }

        if (isset($q['page'])) {
            $q['page'] = trim($q['page'], '/');
            $q['page'] = absint($q['page']);
        }

        // If a month is specified in the querystring, load that month
        if ( $q['m'] ) {
            $q['m'] = '' . preg_replace('|[^0-9]|', '', $q['m']);
            $where .= " AND YEAR($wpdb->posts.post_date)=" . substr($q['m'], 0, 4);
            if (strlen($q['m'])>5)
                $where .= " AND MONTH($wpdb->posts.post_date)=" . substr($q['m'], 4, 2);
            if (strlen($q['m'])>7)
                $where .= " AND DAYOFMONTH($wpdb->posts.post_date)=" . substr($q['m'], 6, 2);
            if (strlen($q['m'])>9)
                $where .= " AND HOUR($wpdb->posts.post_date)=" . substr($q['m'], 8, 2);
            if (strlen($q['m'])>11)
                $where .= " AND MINUTE($wpdb->posts.post_date)=" . substr($q['m'], 10, 2);
            if (strlen($q['m'])>13)
                $where .= " AND SECOND($wpdb->posts.post_date)=" . substr($q['m'], 12, 2);
        }

        if ( '' !== $q['hour'] )
            $where .= " AND HOUR($wpdb->posts.post_date)='" . $q['hour'] . "'";

        if ( '' !== $q['minute'] )
            $where .= " AND MINUTE($wpdb->posts.post_date)='" . $q['minute'] . "'";

        if ( '' !== $q['second'] )
            $where .= " AND SECOND($wpdb->posts.post_date)='" . $q['second'] . "'";

        if ( $q['year'] )
            $where .= " AND YEAR($wpdb->posts.post_date)='" . $q['year'] . "'";

        if ( $q['monthnum'] )
            $where .= " AND MONTH($wpdb->posts.post_date)='" . $q['monthnum'] . "'";

        if ( $q['day'] )
            $where .= " AND DAYOFMONTH($wpdb->posts.post_date)='" . $q['day'] . "'";

        if ('' != $q['name']) {
            $q['name'] = sanitize_title($q['name']);
            $where .= " AND $wpdb->posts.post_name = '" . $q['name'] . "'";
        } else if ('' != $q['pagename']) {
            if ( isset($this->queried_object_id) )
                $reqpage = $this->queried_object_id;
            else {
                $reqpage = get_page_by_path($q['pagename']);
                if ( !empty($reqpage) )
                    $reqpage = $reqpage->ID;
                else
                    $reqpage = 0;
            }

            $page_for_posts = get_option('page_for_posts');
            if  ( ('page' != get_option('show_on_front') ) ||  empty($page_for_posts) || ( $reqpage != $page_for_posts ) ) {
                $q['pagename'] = str_replace('%2F', '/', urlencode(urldecode($q['pagename'])));
                $page_paths = '/' . trim($q['pagename'], '/');
                $q['pagename'] = sanitize_title(basename($page_paths));
                $q['name'] = $q['pagename'];
                $where .= " AND ($wpdb->posts.ID = '$reqpage')";
                $reqpage_obj = get_page($reqpage);
                if ( is_object($reqpage_obj) && 'attachment' == $reqpage_obj->post_type ) {
                    $this->is_attachment = true;
                    $this->is_page = true;
                    $q['attachment_id'] = $reqpage;
                }
            }
        } elseif ('' != $q['attachment']) {
            $q['attachment'] = str_replace('%2F', '/', urlencode(urldecode($q['attachment'])));
            $attach_paths = '/' . trim($q['attachment'], '/');
            $q['attachment'] = sanitize_title(basename($attach_paths));
            $q['name'] = $q['attachment'];
            $where .= " AND $wpdb->posts.post_name = '" . $q['attachment'] . "'";
        }

        if ( $q['w'] )
            $where .= " AND WEEK($wpdb->posts.post_date, 1)='" . $q['w'] . "'";

        if ( intval($q['comments_popup']) )
            $q['p'] = absint($q['comments_popup']);

        // If an attachment is requested by number, let it supercede any post number.
        if ( $q['attachment_id'] )
            $q['p'] = absint($q['attachment_id']);

        // If a post number is specified, load that post
        if ( $q['p'] ) {
            $where .= " AND {$wpdb->posts}.ID = " . $q['p'];
        } elseif ( $q['post__in'] ) {
            $post__in = implode(',', array_map( 'absint', $q['post__in'] ));
            $where .= " AND {$wpdb->posts}.ID IN ($post__in)";
        } elseif ( $q['post__not_in'] ) {
            $post__not_in = implode(',',  array_map( 'absint', $q['post__not_in'] ));
            $where .= " AND {$wpdb->posts}.ID NOT IN ($post__not_in)";
        }

        if ( is_numeric($q['post_parent']) )
            $where .= $wpdb->prepare( " AND $wpdb->posts.post_parent = %d ", $q['post_parent'] );

        if ( $q['page_id'] ) {
            if  ( ('page' != get_option('show_on_front') ) || ( $q['page_id'] != get_option('page_for_posts') ) ) {
                $q['p'] = $q['page_id'];
                $where = " AND {$wpdb->posts}.ID = " . $q['page_id'];
            }
        }

        // If a search pattern is specified, load the posts that match
        if ( !empty($q['s']) ) {
            // added slashes screw with quote grouping when done early, so done later
            $q['s'] = stripslashes($q['s']);
            if ( !empty($q['sentence']) ) {
                $q['search_terms'] = array($q['s']);
            } else {
                preg_match_all('/".*?("|$)|((?<=[\\s",+])|^)[^\\s",+]+/', $q['s'], $matches);
                $q['search_terms'] = array_map('_search_terms_tidy', $matches[0]);
            }
            $n = !empty($q['exact']) ? '' : '%';
            $searchand = '';
            foreach( (array) $q['search_terms'] as $term) {
                $term = addslashes_gpc($term);
                $search .= "{$searchand}(($wpdb->posts.post_title LIKE '{$n}{$term}{$n}') OR ($wpdb->posts.post_content LIKE '{$n}{$term}{$n}'))";
                $searchand = ' AND ';
            }
            $term = esc_sql($q['s']);
            if (empty($q['sentence']) && count($q['search_terms']) > 1 && $q['search_terms'][0] != $q['s'] )
                $search .= " OR ($wpdb->posts.post_title LIKE '{$n}{$term}{$n}') OR ($wpdb->posts.post_content LIKE '{$n}{$term}{$n}')";

            if ( !empty($search) ) {
                $search = " AND ({$search}) ";
                if ( !is_user_logged_in() )
                    $search .= " AND ($wpdb->posts.post_password = '') ";
            }
        }

        // Category stuff

        if ( empty($q['cat']) || ($q['cat'] == '0') ||
                // Bypass cat checks if fetching specific posts
                $this->is_singular ) {
            $whichcat = '';
        } else {
            $q['cat'] = ''.urldecode($q['cat']).'';
            $q['cat'] = addslashes_gpc($q['cat']);
            $cat_array = preg_split('/[,\s]+/', $q['cat']);
            $q['cat'] = '';
            $req_cats = array();
            foreach ( (array) $cat_array as $cat ) {
                $cat = intval($cat);
                $req_cats[] = $cat;
                $in = ($cat > 0);
                $cat = abs($cat);
                if ( $in ) {
                    $q['category__in'][] = $cat;
                    $q['category__in'] = array_merge($q['category__in'], get_term_children($cat, 'category'));
                } else {
                    $q['category__not_in'][] = $cat;
                    $q['category__not_in'] = array_merge($q['category__not_in'], get_term_children($cat, 'category'));
                }
            }
            $q['cat'] = implode(',', $req_cats);
        }

        if ( !empty($q['category__in']) ) {
            $join = " INNER JOIN $wpdb->term_relationships ON ($wpdb->posts.ID = $wpdb->term_relationships.object_id) INNER JOIN $wpdb->term_taxonomy ON ($wpdb->term_relationships.term_taxonomy_id = $wpdb->term_taxonomy.term_taxonomy_id) ";
            $whichcat .= " AND $wpdb->term_taxonomy.taxonomy = 'category' ";
            $include_cats = "'" . implode("', '", $q['category__in']) . "'";
            $whichcat .= " AND $wpdb->term_taxonomy.term_id IN ($include_cats) ";
        }

        if ( !empty($q['category__not_in']) ) {
            $cat_string = "'" . implode("', '", $q['category__not_in']) . "'";
            $whichcat .= " AND $wpdb->posts.ID NOT IN ( SELECT tr.object_id FROM $wpdb->term_relationships AS tr INNER JOIN $wpdb->term_taxonomy AS tt ON tr.term_taxonomy_id = tt.term_taxonomy_id WHERE tt.taxonomy = 'category' AND tt.term_id IN ($cat_string) )";
        }

        // Category stuff for nice URLs
        if ( '' != $q['category_name'] && !$this->is_singular ) {
            $q['category_name'] = implode('/', array_map('sanitize_title', explode('/', $q['category_name'])));
            $reqcat = get_category_by_path($q['category_name']);
            $q['category_name'] = str_replace('%2F', '/', urlencode(urldecode($q['category_name'])));
            $cat_paths = '/' . trim($q['category_name'], '/');
            $q['category_name'] = sanitize_title(basename($cat_paths));

            $cat_paths = '/' . trim(urldecode($q['category_name']), '/');
            $q['category_name'] = sanitize_title(basename($cat_paths));
            $cat_paths = explode('/', $cat_paths);
            $cat_path = '';
            foreach ( (array) $cat_paths as $pathdir )
                $cat_path .= ( $pathdir != '' ? '/' : '' ) . sanitize_title($pathdir);

            //if we don't match the entire hierarchy fallback on just matching the nicename
            if ( empty($reqcat) )
                $reqcat = get_category_by_path($q['category_name'], false);

            if ( !empty($reqcat) )
                $reqcat = $reqcat->term_id;
            else
                $reqcat = 0;

            $q['cat'] = $reqcat;

            $join = " INNER JOIN $wpdb->term_relationships ON ($wpdb->posts.ID = $wpdb->term_relationships.object_id) INNER JOIN $wpdb->term_taxonomy ON ($wpdb->term_relationships.term_taxonomy_id = $wpdb->term_taxonomy.term_taxonomy_id) ";
            $whichcat = " AND $wpdb->term_taxonomy.taxonomy = 'category' ";
            $in_cats = array($q['cat']);
            $in_cats = array_merge($in_cats, get_term_children($q['cat'], 'category'));
            $in_cats = "'" . implode("', '", $in_cats) . "'";
            $whichcat .= "AND $wpdb->term_taxonomy.term_id IN ($in_cats)";
            $groupby = "{$wpdb->posts}.ID";
        }

        // Tags
        if ( '' != $q['tag'] ) {
            if ( strpos($q['tag'], ',') !== false ) {
                $tags = preg_split('/[,\s]+/', $q['tag']);
                foreach ( (array) $tags as $tag ) {
                    $tag = sanitize_term_field('slug', $tag, 0, 'post_tag', 'db');
                    $q['tag_slug__in'][] = $tag;
                }
            } else if ( preg_match('/[+\s]+/', $q['tag']) || !empty($q['cat']) ) {
                $tags = preg_split('/[+\s]+/', $q['tag']);
                foreach ( (array) $tags as $tag ) {
                    $tag = sanitize_term_field('slug', $tag, 0, 'post_tag', 'db');
                    $q['tag_slug__and'][] = $tag;
                }
            } else {
                $q['tag'] = sanitize_term_field('slug', $q['tag'], 0, 'post_tag', 'db');
                $q['tag_slug__in'][] = $q['tag'];
            }
        }

        if ( !empty($q['category__in']) || !empty($q['meta_key']) || !empty($q['tag__in']) || !empty($q['tag_slug__in']) ) {
            $groupby = "{$wpdb->posts}.ID";
        }

        if ( !empty($q['tag__in']) && empty($q['cat']) ) {
            $join = " INNER JOIN $wpdb->term_relationships ON ($wpdb->posts.ID = $wpdb->term_relationships.object_id) INNER JOIN $wpdb->term_taxonomy ON ($wpdb->term_relationships.term_taxonomy_id = $wpdb->term_taxonomy.term_taxonomy_id) ";
            $whichcat .= " AND $wpdb->term_taxonomy.taxonomy = 'post_tag' ";
            $include_tags = "'" . implode("', '", $q['tag__in']) . "'";
            $whichcat .= " AND $wpdb->term_taxonomy.term_id IN ($include_tags) ";
            $reqtag = is_term( $q['tag__in'][0], 'post_tag' );
            if ( !empty($reqtag) )
                $q['tag_id'] = $reqtag['term_id'];
        }

        if ( !empty($q['tag_slug__in']) && empty($q['cat']) ) {
            $join = " INNER JOIN $wpdb->term_relationships ON ($wpdb->posts.ID = $wpdb->term_relationships.object_id) INNER JOIN $wpdb->term_taxonomy ON ($wpdb->term_relationships.term_taxonomy_id = $wpdb->term_taxonomy.term_taxonomy_id) INNER JOIN $wpdb->terms ON ($wpdb->term_taxonomy.term_id = $wpdb->terms.term_id) ";
            $whichcat .= " AND $wpdb->term_taxonomy.taxonomy = 'post_tag' ";
            $include_tags = "'" . implode("', '", $q['tag_slug__in']) . "'";
            $whichcat .= " AND $wpdb->terms.slug IN ($include_tags) ";
            $reqtag = get_term_by( 'slug', $q['tag_slug__in'][0], 'post_tag' );
            if ( !empty($reqtag) )
                $q['tag_id'] = $reqtag->term_id;
        }

        if ( !empty($q['tag__not_in']) ) {
            $tag_string = "'" . implode("', '", $q['tag__not_in']) . "'";
            $whichcat .= " AND $wpdb->posts.ID NOT IN ( SELECT tr.object_id FROM $wpdb->term_relationships AS tr INNER JOIN $wpdb->term_taxonomy AS tt ON tr.term_taxonomy_id = tt.term_taxonomy_id WHERE tt.taxonomy = 'post_tag' AND tt.term_id IN ($tag_string) )";
        }

        // Tag and slug intersections.
        $intersections = array('category__and' => 'category', 'tag__and' => 'post_tag', 'tag_slug__and' => 'post_tag', 'tag__in' => 'post_tag', 'tag_slug__in' => 'post_tag');
        $tagin = array('tag__in', 'tag_slug__in'); // These are used to make some exceptions below
        foreach ($intersections as $item => $taxonomy) {
            if ( empty($q[$item]) ) continue;
            if ( in_array($item, $tagin) && empty($q['cat']) ) continue; // We should already have what we need if categories aren't being used

            if ( $item != 'category__and' ) {
                $reqtag = is_term( $q[$item][0], 'post_tag' );
                if ( !empty($reqtag) )
                    $q['tag_id'] = $reqtag['term_id'];
            }

            if ( in_array( $item, array('tag_slug__and', 'tag_slug__in' ) ) )
                $taxonomy_field = 'slug';
            else
                $taxonomy_field = 'term_id';

            $q[$item] = array_unique($q[$item]);
            $tsql = "SELECT p.ID FROM $wpdb->posts p INNER JOIN $wpdb->term_relationships tr ON (p.ID = tr.object_id) INNER JOIN $wpdb->term_taxonomy tt ON (tr.term_taxonomy_id = tt.term_taxonomy_id) INNER JOIN $wpdb->terms t ON (tt.term_id = t.term_id)";
            $tsql .= " WHERE tt.taxonomy = '$taxonomy' AND t.$taxonomy_field IN ('" . implode("', '", $q[$item]) . "')";
            if ( !in_array($item, $tagin) ) { // This next line is only helpful if we are doing an and relationship
                $tsql .= " GROUP BY p.ID HAVING count(p.ID) = " . count($q[$item]);
            }
            $post_ids = $wpdb->get_col($tsql);

            if ( count($post_ids) )
                $whichcat .= " AND $wpdb->posts.ID IN (" . implode(', ', $post_ids) . ") ";
            else {
                $whichcat = " AND 0 = 1";
                break;
            }
        }

        // Taxonomies
        if ( $this->is_tax ) {
            if ( '' != $q['taxonomy'] ) {
                $taxonomy = $q['taxonomy'];
                $tt[$taxonomy] = $q['term'];
                $terms = get_terms($q['taxonomy'], array('slug'=>$q['term']));
            } else {
                foreach ( $GLOBALS['wp_taxonomies'] as $taxonomy => $t ) {
                    if ( $t->query_var && '' != $q[$t->query_var] ) {
                        $terms = get_terms($taxonomy, array('slug'=>$q[$t->query_var]));
                        if ( !is_wp_error($terms) )
                            break;
                    }
                }
            }
            if ( is_wp_error($terms) || empty($terms) ) {
                $whichcat = " AND 0 ";
            } else {
                foreach ( $terms as $term )
                    $term_ids[] = $term->term_id;
                $post_ids = get_objects_in_term($term_ids, $taxonomy);
                if ( !is_wp_error($post_ids) && count($post_ids) ) {
                    $whichcat .= " AND $wpdb->posts.ID IN (" . implode(', ', $post_ids) . ") ";
                    $post_type = 'any';
                    $q['post_status'] = 'publish';
                    $post_status_join = true;
                } else {
                    $whichcat = " AND 0 ";
                }
            }
        }

        // Author/user stuff

        if ( empty($q['author']) || ($q['author'] == '0') ) {
            $whichauthor='';
        } else {
            $q['author'] = ''.urldecode($q['author']).'';
            $q['author'] = addslashes_gpc($q['author']);
            if (strpos($q['author'], '-') !== false) {
                $eq = '!=';
                $andor = 'AND';
                $q['author'] = explode('-', $q['author']);
                $q['author'] = '' . absint($q['author'][1]);
            } else {
                $eq = '=';
                $andor = 'OR';
            }
            $author_array = preg_split('/[,\s]+/', $q['author']);
            $whichauthor .= " AND ($wpdb->posts.post_author ".$eq.' '.absint($author_array[0]);
            for ($i = 1; $i < (count($author_array)); $i = $i + 1) {
                $whichauthor .= ' '.$andor." $wpdb->posts.post_author ".$eq.' '.absint($author_array[$i]);
            }
            $whichauthor .= ')';
        }

        // Author stuff for nice URLs

        if ('' != $q['author_name']) {
            if (strpos($q['author_name'], '/') !== false) {
                $q['author_name'] = explode('/',$q['author_name']);
                if ($q['author_name'][count($q['author_name'])-1]) {
                    $q['author_name'] = $q['author_name'][count($q['author_name'])-1];#no trailing slash
                } else {
                    $q['author_name'] = $q['author_name'][count($q['author_name'])-2];#there was a trailling slash
                }
            }
            $q['author_name'] = sanitize_title($q['author_name']);
            $q['author'] = $wpdb->get_var("SELECT ID FROM $wpdb->users WHERE user_nicename='".$q['author_name']."'");
            $q['author'] = get_user_by('slug', $q['author_name']);
            if ( $q['author'] )
                $q['author'] = $q['author']->ID;
            $whichauthor .= " AND ($wpdb->posts.post_author = ".absint($q['author']).')';
        }

        // MIME-Type stuff for attachment browsing

        if ( isset($q['post_mime_type']) && '' != $q['post_mime_type'] )
            $whichmimetype = wp_post_mime_type_where($q['post_mime_type']);

        $where .= $search.$whichcat.$whichauthor.$whichmimetype;

        if ( empty($q['order']) || ((strtoupper($q['order']) != 'ASC') && (strtoupper($q['order']) != 'DESC')) )
            $q['order'] = 'DESC';

        // Order by
        if ( empty($q['orderby']) ) {
            $q['orderby'] = "$wpdb->posts.post_date ".$q['order'];
        } elseif ( 'none' == $q['orderby'] ) {
            $q['orderby'] = '';
        } else {
            // Used to filter values
            $allowed_keys = array('author', 'date', 'title', 'modified', 'menu_order', 'parent', 'ID', 'rand', 'comment_count');
            if ( !empty($q['meta_key']) ) {
                $allowed_keys[] = $q['meta_key'];
                $allowed_keys[] = 'meta_value';
            }
            $q['orderby'] = urldecode($q['orderby']);
            $q['orderby'] = addslashes_gpc($q['orderby']);
            $orderby_array = explode(' ',$q['orderby']);
            if ( empty($orderby_array) )
                $orderby_array[] = $q['orderby'];
            $q['orderby'] = '';
            for ($i = 0; $i < count($orderby_array); $i++) {
                // Only allow certain values for safety
                $orderby = $orderby_array[$i];
                switch ($orderby) {
                    case 'menu_order':
                        break;
                    case 'ID':
                        $orderby = "$wpdb->posts.ID";
                        break;
                    case 'rand':
                        $orderby = 'RAND()';
                        break;
                    case $q['meta_key']:
                    case 'meta_value':
                        $orderby = "$wpdb->postmeta.meta_value";
                        break;
                    case 'comment_count':
                        $orderby = "$wpdb->posts.comment_count";
                        break;
                    default:
                        $orderby = "$wpdb->posts.post_" . $orderby;
                }
                if ( in_array($orderby_array[$i], $allowed_keys) )
                    $q['orderby'] .= (($i == 0) ? '' : ',') . $orderby;
            }
            // append ASC or DESC at the end
            if ( !empty($q['orderby']))
                $q['orderby'] .= " {$q['order']}";

            if ( empty($q['orderby']) )
                $q['orderby'] = "$wpdb->posts.post_date ".$q['order'];
        }

        if ( is_array($post_type) )
            $post_type_cap = 'multiple_post_type';
        else
            $post_type_cap = $post_type;

        $exclude_post_types = '';
        foreach ( get_post_types( array('exclude_from_search' => true) ) as $_wp_post_type )
            $exclude_post_types .= $wpdb->prepare(" AND $wpdb->posts.post_type != %s", $_wp_post_type);

        if ( 'any' == $post_type ) {
            $where .= $exclude_post_types;
        } elseif ( !empty( $post_type ) && is_array( $post_type ) ) {
            $where .= " AND $wpdb->posts.post_type IN ('" . join("', '", $post_type) . "')"; 
        } elseif ( ! empty( $post_type ) ) {
            $where .= " AND $wpdb->posts.post_type = '$post_type'";
        } elseif ( $this->is_attachment ) {
            $where .= " AND $wpdb->posts.post_type = 'attachment'";
            $post_type_cap = 'post';
        } elseif ($this->is_page) {
            $where .= " AND $wpdb->posts.post_type = 'page'";
            $post_type_cap = 'page';
        } else {
            $where .= " AND $wpdb->posts.post_type = 'post'";
            $post_type_cap = 'post';
        }

        if ( isset($q['post_status']) && '' != $q['post_status'] ) {
            $statuswheres = array();
            $q_status = explode(',', $q['post_status']);
            $r_status = array();
            $p_status = array();
            if ( $q['post_status'] == 'any' ) {
                // @todo Use register_post_status() data to determine which states should be excluded.
                $r_status[] = "$wpdb->posts.post_status <> 'trash'";
            } else {
                if ( in_array( 'draft'  , $q_status ) )
                    $r_status[] = "$wpdb->posts.post_status = 'draft'";
                if ( in_array( 'pending', $q_status ) )
                    $r_status[] = "$wpdb->posts.post_status = 'pending'";
                if ( in_array( 'future' , $q_status ) )
                    $r_status[] = "$wpdb->posts.post_status = 'future'";
                if ( in_array( 'inherit' , $q_status ) )
                    $r_status[] = "$wpdb->posts.post_status = 'inherit'";
                if ( in_array( 'private', $q_status ) )
                    $p_status[] = "$wpdb->posts.post_status = 'private'";
                if ( in_array( 'publish', $q_status ) )
                    $r_status[] = "$wpdb->posts.post_status = 'publish'";
                if ( in_array( 'trash', $q_status ) )
                    $r_status[] = "$wpdb->posts.post_status = 'trash'";
            }

            if ( empty($q['perm'] ) || 'readable' != $q['perm'] ) {
                $r_status = array_merge($r_status, $p_status);
                unset($p_status);
            }

            if ( !empty($r_status) ) {
                if ( !empty($q['perm'] ) && 'editable' == $q['perm'] && !current_user_can("edit_others_{$post_type_cap}s") )
                    $statuswheres[] = "($wpdb->posts.post_author = $user_ID " .  "AND (" . join( ' OR ', $r_status ) . "))";
                else
                    $statuswheres[] = "(" . join( ' OR ', $r_status ) . ")";
            }
            if ( !empty($p_status) ) {
                if ( !empty($q['perm'] ) && 'readable' == $q['perm'] && !current_user_can("read_private_{$post_type_cap}s") )
                    $statuswheres[] = "($wpdb->posts.post_author = $user_ID " .  "AND (" . join( ' OR ', $p_status ) . "))";
                else
                    $statuswheres[] = "(" . join( ' OR ', $p_status ) . ")";
            }
            if ( $post_status_join ) {
                $join .= " LEFT JOIN $wpdb->posts AS p2 ON ($wpdb->posts.post_parent = p2.ID) ";
                foreach ( $statuswheres as $index => $statuswhere )
                    $statuswheres[$index] = "($statuswhere OR ($wpdb->posts.post_status = 'inherit' AND " . str_replace($wpdb->posts, 'p2', $statuswhere) . "))";
            }
            foreach ( $statuswheres as $statuswhere )
                $where .= " AND $statuswhere";
        } elseif ( !$this->is_singular ) {
            $where .= " AND ($wpdb->posts.post_status = 'publish'";

            if ( is_admin() )
                $where .= " OR $wpdb->posts.post_status = 'future' OR $wpdb->posts.post_status = 'draft' OR $wpdb->posts.post_status = 'pending'";

            if ( is_user_logged_in() ) {
                $where .= current_user_can( "read_private_{$post_type_cap}s" ) ? " OR $wpdb->posts.post_status = 'private'" : " OR $wpdb->posts.post_author = $user_ID AND $wpdb->posts.post_status = 'private'";
            }

            $where .= ')';
        }

        // postmeta queries
        if ( ! empty($q['meta_key']) || ! empty($q['meta_value']) )
            $join .= " JOIN $wpdb->postmeta ON ($wpdb->posts.ID = $wpdb->postmeta.post_id) ";
        if ( ! empty($q['meta_key']) )
            $where .= $wpdb->prepare(" AND $wpdb->postmeta.meta_key = %s ", $q['meta_key']);
        if ( ! empty($q['meta_value']) ) {
            if ( ! isset($q['meta_compare']) || empty($q['meta_compare']) || ! in_array($q['meta_compare'], array('=', '!=', '>', '>=', '<', '<=')) )
                $q['meta_compare'] = '=';

            $where .= $wpdb->prepare("AND $wpdb->postmeta.meta_value {$q['meta_compare']} %s ", $q['meta_value']);
        }

        // Apply filters on where and join prior to paging so that any
        // manipulations to them are reflected in the paging by day queries.
        if ( !$q['suppress_filters'] ) {
            $where = apply_filters('posts_where', $where);
            $join = apply_filters('posts_join', $join);
        }

        // Paging
        if ( empty($q['nopaging']) && !$this->is_singular ) {
            $page = absint($q['paged']);
            if (empty($page)) {
                $page = 1;
            }

            if ( empty($q['offset']) ) {
                $pgstrt = '';
                $pgstrt = ($page - 1) * $q['posts_per_page'] . ', ';
                $limits = 'LIMIT '.$pgstrt.$q['posts_per_page'];
            } else { // we're ignoring $page and using 'offset'
                $q['offset'] = absint($q['offset']);
                $pgstrt = $q['offset'] . ', ';
                $limits = 'LIMIT ' . $pgstrt . $q['posts_per_page'];
            }
        }

        // Comments feeds
        if ( $this->is_comment_feed && ( $this->is_archive || $this->is_search || !$this->is_singular ) ) {
            if ( $this->is_archive || $this->is_search ) {
                $cjoin = "JOIN $wpdb->posts ON ($wpdb->comments.comment_post_ID = $wpdb->posts.ID) $join ";
                $cwhere = "WHERE comment_approved = '1' $where";
                $cgroupby = "$wpdb->comments.comment_id";
            } else { // Other non singular e.g. front
                $cjoin = "JOIN $wpdb->posts ON ( $wpdb->comments.comment_post_ID = $wpdb->posts.ID )";
                $cwhere = "WHERE post_status = 'publish' AND comment_approved = '1'";
                $cgroupby = '';
            }

            if ( !$q['suppress_filters'] ) {
                $cjoin = apply_filters('comment_feed_join', $cjoin);
                $cwhere = apply_filters('comment_feed_where', $cwhere);
                $cgroupby = apply_filters('comment_feed_groupby', $cgroupby);
                $corderby = apply_filters('comment_feed_orderby', 'comment_date_gmt DESC');
                $climits = apply_filters('comment_feed_limits', 'LIMIT ' . get_option('posts_per_rss'));
            }
            $cgroupby = ( ! empty( $cgroupby ) ) ? 'GROUP BY ' . $cgroupby : '';
            $corderby = ( ! empty( $corderby ) ) ? 'ORDER BY ' . $corderby : '';

            $this->comments = (array) $wpdb->get_results("SELECT $distinct $wpdb->comments.* FROM $wpdb->comments $cjoin $cwhere $cgroupby $corderby $climits");
            $this->comment_count = count($this->comments);

            $post_ids = array();

            foreach ($this->comments as $comment)
                $post_ids[] = (int) $comment->comment_post_ID;

            $post_ids = join(',', $post_ids);
            $join = '';
            if ( $post_ids )
                $where = "AND $wpdb->posts.ID IN ($post_ids) ";
            else
                $where = "AND 0";
        }

        $orderby = $q['orderby'];

        // Apply post-paging filters on where and join.  Only plugins that
        // manipulate paging queries should use these hooks.
        if ( !$q['suppress_filters'] ) {
            $where = apply_filters('posts_where_paged', $where);
            $groupby = apply_filters('posts_groupby', $groupby);
            $join = apply_filters('posts_join_paged', $join);
            $orderby = apply_filters('posts_orderby', $orderby);
            $distinct = apply_filters('posts_distinct', $distinct);
            $limits = apply_filters( 'post_limits', $limits );

            $fields = apply_filters('posts_fields', $fields);
        }

        // Announce current selection parameters.  For use by caching plugins.
        do_action( 'posts_selection', $where . $groupby . $orderby . $limits . $join );

        // Filter again for the benefit of caching plugins.  Regular plugins should use the hooks above.
        if ( !$q['suppress_filters'] ) {
            $where = apply_filters('posts_where_request', $where);
            $groupby = apply_filters('posts_groupby_request', $groupby);
            $join = apply_filters('posts_join_request', $join);
            $orderby = apply_filters('posts_orderby_request', $orderby);
            $distinct = apply_filters('posts_distinct_request', $distinct);
            $fields = apply_filters('posts_fields_request', $fields);
            $limits = apply_filters( 'post_limits_request', $limits );
        }

        if ( ! empty($groupby) )
            $groupby = 'GROUP BY ' . $groupby;
        if ( !empty( $orderby ) )
            $orderby = 'ORDER BY ' . $orderby;
        $found_rows = '';
        if ( !empty($limits) )
            $found_rows = 'SQL_CALC_FOUND_ROWS';

        $this->request = " SELECT $found_rows $distinct $fields FROM $wpdb->posts $join WHERE 1=1 $where $groupby $orderby $limits";
        if ( !$q['suppress_filters'] )
            $this->request = apply_filters('posts_request', $this->request);

        $this->posts = $wpdb->get_results($this->request);
        // Raw results filter.  Prior to status checks.
        if ( !$q['suppress_filters'] )
            $this->posts = apply_filters('posts_results', $this->posts);

        if ( !empty($this->posts) && $this->is_comment_feed && $this->is_singular ) {
            $cjoin = apply_filters('comment_feed_join', '');
            $cwhere = apply_filters('comment_feed_where', "WHERE comment_post_ID = '{$this->posts[0]->ID}' AND comment_approved = '1'");
            $cgroupby = apply_filters('comment_feed_groupby', '');
            $cgroupby = ( ! empty( $cgroupby ) ) ? 'GROUP BY ' . $cgroupby : '';
            $corderby = apply_filters('comment_feed_orderby', 'comment_date_gmt DESC');
            $corderby = ( ! empty( $corderby ) ) ? 'ORDER BY ' . $corderby : '';
            $climits = apply_filters('comment_feed_limits', 'LIMIT ' . get_option('posts_per_rss'));
            $comments_request = "SELECT $wpdb->comments.* FROM $wpdb->comments $cjoin $cwhere $cgroupby $corderby $climits";
            $this->comments = $wpdb->get_results($comments_request);
            $this->comment_count = count($this->comments);
        }

        if ( !empty($limits) ) {
            $found_posts_query = apply_filters( 'found_posts_query', 'SELECT FOUND_ROWS()' );
            $this->found_posts = $wpdb->get_var( $found_posts_query );
            $this->found_posts = apply_filters( 'found_posts', $this->found_posts );
            $this->max_num_pages = ceil($this->found_posts / $q['posts_per_page']);
        }

        // Check post status to determine if post should be displayed.
        if ( !empty($this->posts) && ($this->is_single || $this->is_page) ) {
            $status = get_post_status($this->posts[0]);
            //$type = get_post_type($this->posts[0]);
            if ( ('publish' != $status) ) {
                if ( ! is_user_logged_in() ) {
                    // User must be logged in to view unpublished posts.
                    $this->posts = array();
                } else {
                    if  (in_array($status, array('draft', 'pending', 'trash')) ) {
                        // User must have edit permissions on the draft to preview.
                        if (! current_user_can("edit_$post_type_cap", $this->posts[0]->ID)) {
                            $this->posts = array();
                        } else {
                            $this->is_preview = true;
                            $this->posts[0]->post_date = current_time('mysql');
                        }
                    }  else if ('future' == $status) {
                        $this->is_preview = true;
                        if (!current_user_can("edit_$post_type_cap", $this->posts[0]->ID)) {
                            $this->posts = array ( );
                        }
                    } else {
                        if (! current_user_can("read_$post_type_cap", $this->posts[0]->ID))
                            $this->posts = array();
                    }
                }
            }

            if ( $this->is_preview && current_user_can( "edit_{$post_type_cap}", $this->posts[0]->ID ) )
                $this->posts[0] = apply_filters('the_preview', $this->posts[0]);
        }

        // Put sticky posts at the top of the posts array
        $sticky_posts = get_option('sticky_posts');
        if ( $this->is_home && $page <= 1 && is_array($sticky_posts) && !empty($sticky_posts) && !$q['caller_get_posts'] ) {
            $num_posts = count($this->posts);
            $sticky_offset = 0;
            // Loop over posts and relocate stickies to the front.
            for ( $i = 0; $i < $num_posts; $i++ ) {
                if ( in_array($this->posts[$i]->ID, $sticky_posts) ) {
                    $sticky_post = $this->posts[$i];
                    // Remove sticky from current position
                    array_splice($this->posts, $i, 1);
                    // Move to front, after other stickies
                    array_splice($this->posts, $sticky_offset, 0, array($sticky_post));
                    // Increment the sticky offset.  The next sticky will be placed at this offset.
                    $sticky_offset++;
                    // Remove post from sticky posts array
                    $offset = array_search($sticky_post->ID, $sticky_posts);
                    array_splice($sticky_posts, $offset, 1);
                }
            }

            // Fetch sticky posts that weren't in the query results
            if ( !empty($sticky_posts) ) {
                $stickies__in = implode(',', array_map( 'absint', $sticky_posts ));
                // honor post type(s) if not set to any
                $stickies_where = '';
                if ( 'any' != $post_type && '' != $post_type ) {
                    if ( is_array( $post_type ) ) {
                        $post_types = join( "', '", $post_type );
                    } else {
                        $post_types = $post_type;
                    }
                    $stickies_where = "AND $wpdb->posts.post_type IN ('" . $post_types . "')";
                }
                $stickies = $wpdb->get_results( "SELECT * FROM $wpdb->posts WHERE $wpdb->posts.ID IN ($stickies__in) $stickies_where" );
                /** @todo Make sure post is published or viewable by the current user */
                foreach ( $stickies as $sticky_post ) {
                    if ( 'publish' != $sticky_post->post_status )
                        continue;
                        array_splice($this->posts, $sticky_offset, 0, array($sticky_post));
                        $sticky_offset++;
                }
            }
        }

        if ( !$q['suppress_filters'] )
            $this->posts = apply_filters('the_posts', $this->posts);

        $this->post_count = count($this->posts);

        // Sanitize before caching so it'll only get done once
        for ($i = 0; $i < $this->post_count; $i++) {
            $this->posts[$i] = sanitize_post($this->posts[$i], 'raw');
        }

        update_post_caches($this->posts);

        if ($this->post_count > 0) {
            $this->post = $this->posts[0];
        }

        return $this->posts;
    }

    /**
     * Setup the next post and iterate current post index.
     *
     * @since 1.5.0
     * @access public
     *
     * @return object Next post.
     */
    function next_post() {

        $this->current_post++;

        $this->post = $this->posts[$this->current_post];
        return $this->post;
    }

    /**
     * Sets up the current post.
     *
     * Retrieves the next post, sets up the post, sets the 'in the loop'
     * property to true.
     *
     * @since 1.5.0
     * @access public
     * @uses $post
     * @uses do_action_ref_array() Calls 'loop_start' if loop has just started
     */
    function the_post() {
        global $post;
        $this->in_the_loop = true;

        if ( $this->current_post == -1 ) // loop has just started
            do_action_ref_array('loop_start', array(&$this));

        $post = $this->next_post();
        setup_postdata($post);
    }

    /**
     * Whether there are more posts available in the loop.
     *
     * Calls action 'loop_end', when the loop is complete.
     *
     * @since 1.5.0
     * @access public
     * @uses do_action_ref_array() Calls 'loop_end' if loop is ended
     *
     * @return bool True if posts are available, false if end of loop.
     */
    function have_posts() {
        if ($this->current_post + 1 < $this->post_count) {
            return true;
        } elseif ($this->current_post + 1 == $this->post_count && $this->post_count > 0) {
            do_action_ref_array('loop_end', array(&$this));
            // Do some cleaning up after the loop
            $this->rewind_posts();
        }

        $this->in_the_loop = false;
        return false;
    }

    /**
     * Rewind the posts and reset post index.
     *
     * @since 1.5.0
     * @access public
     */
    function rewind_posts() {
        $this->current_post = -1;
        if ($this->post_count > 0) {
            $this->post = $this->posts[0];
        }
    }

    /**
     * Iterate current comment index and return comment object.
     *
     * @since 2.2.0
     * @access public
     *
     * @return object Comment object.
     */
    function next_comment() {
        $this->current_comment++;

        $this->comment = $this->comments[$this->current_comment];
        return $this->comment;
    }

    /**
     * Sets up the current comment.
     *
     * @since 2.2.0
     * @access public
     * @global object $comment Current comment.
     * @uses do_action() Calls 'comment_loop_start' hook when first comment is processed.
     */
    function the_comment() {
        global $comment;

        $comment = $this->next_comment();

        if ($this->current_comment == 0) {
            do_action('comment_loop_start');
        }
    }

    /**
     * Whether there are more comments available.
     *
     * Automatically rewinds comments when finished.
     *
     * @since 2.2.0
     * @access public
     *
     * @return bool True, if more comments. False, if no more posts.
     */
    function have_comments() {
        if ($this->current_comment + 1 < $this->comment_count) {
            return true;
        } elseif ($this->current_comment + 1 == $this->comment_count) {
            $this->rewind_comments();
        }

        return false;
    }

    /**
     * Rewind the comments, resets the comment index and comment to first.
     *
     * @since 2.2.0
     * @access public
     */
    function rewind_comments() {
        $this->current_comment = -1;
        if ($this->comment_count > 0) {
            $this->comment = $this->comments[0];
        }
    }

    /**
     * Sets up the WordPress query by parsing query string.
     *
     * @since 1.5.0
     * @access public
     *
     * @param string $query URL query string.
     * @return array List of posts.
     */
    function &query($query) {
        $this->parse_query($query);
        return $this->get_posts();
    }

    /**
     * Retrieve queried object.
     *
     * If queried object is not set, then the queried object will be set from
     * the category, tag, taxonomy, posts page, single post, page, or author
     * query variable. After it is set up, it will be returned.
     *
     * @since 1.5.0
     * @access public
     *
     * @return object
     */
    function get_queried_object() {
        if (isset($this->queried_object)) {
            return $this->queried_object;
        }

        $this->queried_object = NULL;
        $this->queried_object_id = 0;

        if ($this->is_category) {
            $cat = $this->get('cat');
            $category = &get_category($cat);
            if ( is_wp_error( $category ) )
                return NULL;
            $this->queried_object = &$category;
            $this->queried_object_id = (int) $cat;
        } else if ($this->is_tag) {
            $tag_id = $this->get('tag_id');
            $tag = &get_term($tag_id, 'post_tag');
            if ( is_wp_error( $tag ) )
                return NULL;
            $this->queried_object = &$tag;
            $this->queried_object_id = (int) $tag_id;
        } else if ($this->is_tax) {
            $tax = $this->get('taxonomy');
            $slug = $this->get('term');
            $term = &get_terms($tax, array('slug'=>$slug));
            if ( is_wp_error($term) || empty($term) )
                return NULL;
            $term = $term[0];
            $this->queried_object = $term;
            $this->queried_object_id = $term->term_id;
        } else if ($this->is_posts_page) {
            $this->queried_object = & get_page(get_option('page_for_posts'));
            $this->queried_object_id = (int) $this->queried_object->ID;
        } else if ($this->is_single) {
            $this->queried_object = $this->post;
            $this->queried_object_id = (int) $this->post->ID;
        } else if ($this->is_page) {
            $this->queried_object = $this->post;
            $this->queried_object_id = (int) $this->post->ID;
        } else if ($this->is_author) {
            $author_id = (int) $this->get('author');
            $author = get_userdata($author_id);
            $this->queried_object = $author;
            $this->queried_object_id = $author_id;
        }

        return $this->queried_object;
    }

    /**
     * Retrieve ID of the current queried object.
     *
     * @since 1.5.0
     * @access public
     *
     * @return int
     */
    function get_queried_object_id() {
        $this->get_queried_object();

        if (isset($this->queried_object_id)) {
            return $this->queried_object_id;
        }

        return 0;
    }

    /**
     * PHP4 type constructor.
     *
     * Sets up the WordPress query, if parameter is not empty.
     *
     * @since 1.5.0
     * @access public
     *
     * @param string $query URL query string.
     * @return WP_Query
     */
    function WP_Query ($query = '') {
        if (! empty($query)) {
            $this->query($query);
        }
    }
}

/**
 * Redirect old slugs to the correct permalink.
 *
 * Attempts to find the current slug from the past slugs.
 *
 * @since 2.1.0
 * @uses $wp_query
 * @uses $wpdb
 *
 * @return null If no link is found, null is returned.
 */
function wp_old_slug_redirect () {
    global $wp_query;
    if ( is_404() && '' != $wp_query->query_vars['name'] ) :
        global $wpdb;

        $query = "SELECT post_id FROM $wpdb->postmeta, $wpdb->posts WHERE ID = post_id AND meta_key = '_wp_old_slug' AND meta_value='" . $wp_query->query_vars['name'] . "'";

        // if year, monthnum, or day have been specified, make our query more precise
        // just in case there are multiple identical _wp_old_slug values
        if ( '' != $wp_query->query_vars['year'] )
            $query .= " AND YEAR(post_date) = '{$wp_query->query_vars['year']}'";
        if ( '' != $wp_query->query_vars['monthnum'] )
            $query .= " AND MONTH(post_date) = '{$wp_query->query_vars['monthnum']}'";
        if ( '' != $wp_query->query_vars['day'] )
            $query .= " AND DAYOFMONTH(post_date) = '{$wp_query->query_vars['day']}'";

        $id = (int) $wpdb->get_var($query);

        if ( !$id )
            return;

        $link = get_permalink($id);

        if ( !$link )
            return;

        wp_redirect($link, '301'); // Permanent redirect
        exit;
    endif;
}

/**
 * Setup global post data.
 *
 * @since 1.5.0
 *
 * @param object $post Post data.
 * @uses do_action_ref_array() Calls 'the_post'
 * @return bool True when finished.
 */
function setup_postdata($post) {
    global $id, $authordata, $day, $currentmonth, $page, $pages, $multipage, $more, $numpages;

    $id = (int) $post->ID;

    $authordata = get_userdata($post->post_author);

    $day = mysql2date('d.m.y', $post->post_date, false);
    $currentmonth = mysql2date('m', $post->post_date, false);
    $numpages = 1;
    $page = get_query_var('page');
    if ( !$page )
        $page = 1;
    if ( is_single() || is_page() || is_feed() )
        $more = 1;
    $content = $post->post_content;
    if ( strpos( $content, '<!--nextpage-->' ) ) {
        if ( $page > 1 )
            $more = 1;
        $multipage = 1;
        $content = str_replace("\n<!--nextpage-->\n", '<!--nextpage-->', $content);
        $content = str_replace("\n<!--nextpage-->", '<!--nextpage-->', $content);
        $content = str_replace("<!--nextpage-->\n", '<!--nextpage-->', $content);
        $pages = explode('<!--nextpage-->', $content);
        $numpages = count($pages);
    } else {
        $pages[0] = $post->post_content;
        $multipage = 0;
    }

    do_action_ref_array('the_post', array(&$post));

    return true;
}

?>