Web.Admin/2014/wordpress/wp-includes/category.php
<?php
/**
* WordPress Category API
*
* @package WordPress
*/
/**
* Retrieves all category IDs.
*
* @since 2.0.0
* @link http://codex.wordpress.org/Function_Reference/get_all_category_ids
*
* @return object List of all of the category IDs.
*/
function get_all_category_ids() {
if ( ! $cat_ids = wp_cache_get( 'all_category_ids', 'category' ) ) {
$cat_ids = get_terms( 'category', 'fields=ids&get=all' );
wp_cache_add( 'all_category_ids', $cat_ids, 'category' );
}
return $cat_ids;
}
/**
* Retrieve list of category objects.
*
* If you change the type to 'link' in the arguments, then the link categories
* will be returned instead. Also all categories will be updated to be backwards
* compatible with pre-2.3 plugins and themes.
*
* @since 2.1.0
* @see get_terms() Type of arguments that can be changed.
* @link http://codex.wordpress.org/Function_Reference/get_categories
*
* @param string|array $args Optional. Change the defaults retrieving categories.
* @return array List of categories.
*/
function &get_categories( $args = '' ) {
$defaults = array( 'type' => 'category' );
$args = wp_parse_args( $args, $defaults );
$taxonomy = apply_filters( 'get_categories_taxonomy', 'category', $args );
if ( 'link' == $args['type'] )
$taxonomy = 'link_category';
$categories = (array) get_terms( $taxonomy, $args );
foreach ( array_keys( $categories ) as $k )
_make_cat_compat( $categories[$k] );
return $categories;
}
/**
* Retrieves category data given a category ID or category object.
*
* If you pass the $category parameter an object, which is assumed to be the
* category row object retrieved the database. It will cache the category data.
*
* If you pass $category an integer of the category ID, then that category will
* be retrieved from the database, if it isn't already cached, and pass it back.
*
* If you look at get_term(), then both types will be passed through several
* filters and finally sanitized based on the $filter parameter value.
*
* The category will converted to maintain backwards compatibility.
*
* @since 1.5.1
* @uses get_term() Used to get the category data from the taxonomy.
*
* @param int|object $category Category ID or Category row object
* @param string $output Optional. Constant OBJECT, ARRAY_A, or ARRAY_N
* @param string $filter Optional. Default is raw or no WordPress defined filter will applied.
* @return mixed Category data in type defined by $output parameter.
*/
function &get_category( $category, $output = OBJECT, $filter = 'raw' ) {
$category = get_term( $category, 'category', $output, $filter );
if ( is_wp_error( $category ) )
return $category;
_make_cat_compat( $category );
return $category;
}
/**
* Retrieve category based on URL containing the category slug.
*
* Breaks the $category_path parameter up to get the category slug.
*
* Tries to find the child path and will return it. If it doesn't find a
* match, then it will return the first category matching slug, if $full_match,
* is set to false. If it does not, then it will return null.
*
* It is also possible that it will return a WP_Error object on failure. Check
* for it when using this function.
*
* @since 2.1.0
*
* @param string $category_path URL containing category slugs.
* @param bool $full_match Optional. Whether should match full path or not.
* @param string $output Optional. Constant OBJECT, ARRAY_A, or ARRAY_N
* @return null|object|array Null on failure. Type is based on $output value.
*/
function get_category_by_path( $category_path, $full_match = true, $output = OBJECT ) {
$category_path = rawurlencode( urldecode( $category_path ) );
$category_path = str_replace( '%2F', '/', $category_path );
$category_path = str_replace( '%20', ' ', $category_path );
$category_paths = '/' . trim( $category_path, '/' );
$leaf_path = sanitize_title( basename( $category_paths ) );
$category_paths = explode( '/', $category_paths );
$full_path = '';
foreach ( (array) $category_paths as $pathdir )
$full_path .= ( $pathdir != '' ? '/' : '' ) . sanitize_title( $pathdir );
$categories = get_terms( 'category', "get=all&slug=$leaf_path" );
if ( empty( $categories ) )
return null;
foreach ( $categories as $category ) {
$path = '/' . $leaf_path;
$curcategory = $category;
while ( ( $curcategory->parent != 0 ) && ( $curcategory->parent != $curcategory->term_id ) ) {
$curcategory = get_term( $curcategory->parent, 'category' );
if ( is_wp_error( $curcategory ) )
return $curcategory;
$path = '/' . $curcategory->slug . $path;
}
if ( $path == $full_path )
return get_category( $category->term_id, $output );
}
// If full matching is not required, return the first cat that matches the leaf.
if ( ! $full_match )
return get_category( $categories[0]->term_id, $output );
return null;
}
/**
* Retrieve category object by category slug.
*
* @since 2.3.0
*
* @param string $slug The category slug.
* @return object Category data object
*/
function get_category_by_slug( $slug ) {
$category = get_term_by( 'slug', $slug, 'category' );
if ( $category )
_make_cat_compat( $category );
return $category;
}
/**
* Retrieve the ID of a category from its name.
*
* @since 1.0.0
*
* @param string $cat_name Optional. Default is 'General' and can be any category name.
* @return int 0, if failure and ID of category on success.
*/
function get_cat_ID( $cat_name='General' ) {
$cat = get_term_by( 'name', $cat_name, 'category' );
if ( $cat )
return $cat->term_id;
return 0;
}
/**
* Retrieve the name of a category from its ID.
*
* @since 1.0.0
*
* @param int $cat_id Category ID
* @return string Category name
*/
function get_cat_name( $cat_id ) {
$cat_id = (int) $cat_id;
$category = &get_category( $cat_id );
return $category->name;
}
/**
* Check if a category is an ancestor of another category.
*
* You can use either an id or the category object for both parameters. If you
* use an integer the category will be retrieved.
*
* @since 2.1.0
*
* @param int|object $cat1 ID or object to check if this is the parent category.
* @param int|object $cat2 The child category.
* @return bool Whether $cat2 is child of $cat1
*/
function cat_is_ancestor_of( $cat1, $cat2 ) {
if ( ! isset($cat1->term_id) )
$cat1 = &get_category( $cat1 );
if ( ! isset($cat2->parent) )
$cat2 = &get_category( $cat2 );
if ( empty($cat1->term_id) || empty($cat2->parent) )
return false;
if ( $cat2->parent == $cat1->term_id )
return true;
return cat_is_ancestor_of( $cat1, get_category( $cat2->parent ) );
}
/**
* Sanitizes category data based on context.
*
* @since 2.3.0
* @uses sanitize_term() See this function for what context are supported.
*
* @param object|array $category Category data
* @param string $context Optional. Default is 'display'.
* @return object|array Same type as $category with sanitized data for safe use.
*/
function sanitize_category( $category, $context = 'display' ) {
return sanitize_term( $category, 'category', $context );
}
/**
* Sanitizes data in single category key field.
*
* @since 2.3.0
* @uses sanitize_term_field() See function for more details.
*
* @param string $field Category key to sanitize
* @param mixed $value Category value to sanitize
* @param int $cat_id Category ID
* @param string $context What filter to use, 'raw', 'display', etc.
* @return mixed Same type as $value after $value has been sanitized.
*/
function sanitize_category_field( $field, $value, $cat_id, $context ) {
return sanitize_term_field( $field, $value, $cat_id, 'category', $context );
}
/* Tags */
/**
* Retrieves all post tags.
*
* @since 2.3.0
* @see get_terms() For list of arguments to pass.
* @uses apply_filters() Calls 'get_tags' hook on array of tags and with $args.
*
* @param string|array $args Tag arguments to use when retrieving tags.
* @return array List of tags.
*/
function &get_tags( $args = '' ) {
$tags = get_terms( 'post_tag', $args );
if ( empty( $tags ) ) {
$return = array();
return $return;
}
$tags = apply_filters( 'get_tags', $tags, $args );
return $tags;
}
/**
* Retrieve post tag by tag ID or tag object.
*
* If you pass the $tag parameter an object, which is assumed to be the tag row
* object retrieved the database. It will cache the tag data.
*
* If you pass $tag an integer of the tag ID, then that tag will
* be retrieved from the database, if it isn't already cached, and pass it back.
*
* If you look at get_term(), then both types will be passed through several
* filters and finally sanitized based on the $filter parameter value.
*
* @since 2.3.0
*
* @param int|object $tag
* @param string $output Optional. Constant OBJECT, ARRAY_A, or ARRAY_N
* @param string $filter Optional. Default is raw or no WordPress defined filter will applied.
* @return object|array Return type based on $output value.
*/
function &get_tag( $tag, $output = OBJECT, $filter = 'raw' ) {
return get_term( $tag, 'post_tag', $output, $filter );
}
/* Cache */
/**
* Update the categories cache.
*
* This function does not appear to be used anymore or does not appear to be
* needed. It might be a legacy function left over from when there was a need
* for updating the category cache.
*
* @since 1.5.0
*
* @return bool Always return True
*/
function update_category_cache() {
return true;
}
/**
* Remove the category cache data based on ID.
*
* @since 2.1.0
* @uses clean_term_cache() Clears the cache for the category based on ID
*
* @param int $id Category ID
*/
function clean_category_cache( $id ) {
clean_term_cache( $id, 'category' );
}
/**
* Update category structure to old pre 2.3 from new taxonomy structure.
*
* This function was added for the taxonomy support to update the new category
* structure with the old category one. This will maintain compatibility with
* plugins and themes which depend on the old key or property names.
*
* The parameter should only be passed a variable and not create the array or
* object inline to the parameter. The reason for this is that parameter is
* passed by reference and PHP will fail unless it has the variable.
*
* There is no return value, because everything is updated on the variable you
* pass to it. This is one of the features with using pass by reference in PHP.
*
* @since 2.3.0
* @access private
*
* @param array|object $category Category Row object or array
*/
function _make_cat_compat( &$category ) {
if ( is_object( $category ) ) {
$category->cat_ID = &$category->term_id;
$category->category_count = &$category->count;
$category->category_description = &$category->description;
$category->cat_name = &$category->name;
$category->category_nicename = &$category->slug;
$category->category_parent = &$category->parent;
} elseif ( is_array( $category ) && isset( $category['term_id'] ) ) {
$category['cat_ID'] = &$category['term_id'];
$category['category_count'] = &$category['count'];
$category['category_description'] = &$category['description'];
$category['cat_name'] = &$category['name'];
$category['category_nicename'] = &$category['slug'];
$category['category_parent'] = &$category['parent'];
}
}
?>