Web.Admin/2014/wordpress/wp-includes/formatting.php
<?php
/**
* Main WordPress Formatting API.
*
* Handles many functions for formatting output.
*
* @package WordPress
**/
/**
* Replaces common plain text characters into formatted entities
*
* As an example,
* <code>
* 'cause today's effort makes it worth tomorrow's "holiday"...
* </code>
* Becomes:
* <code>
* ’cause today’s effort makes it worth tomorrow’s “holiday”…
* </code>
* Code within certain html blocks are skipped.
*
* @since 0.71
* @uses $wp_cockneyreplace Array of formatted entities for certain common phrases
*
* @param string $text The text to be formatted
* @return string The string replaced with html entities
*/
function wptexturize($text) {
global $wp_cockneyreplace;
static $static_setup = false, $opening_quote, $closing_quote, $default_no_texturize_tags, $default_no_texturize_shortcodes, $static_characters, $static_replacements, $dynamic_characters, $dynamic_replacements;
$output = '';
$curl = '';
$textarr = preg_split('/(<.*>|\[.*\])/Us', $text, -1, PREG_SPLIT_DELIM_CAPTURE);
$stop = count($textarr);
// No need to setup these variables more than once
if (!$static_setup) {
/* translators: opening curly quote */
$opening_quote = _x('“', 'opening curly quote');
/* translators: closing curly quote */
$closing_quote = _x('”', 'closing curly quote');
$default_no_texturize_tags = array('pre', 'code', 'kbd', 'style', 'script', 'tt');
$default_no_texturize_shortcodes = array('code');
// if a plugin has provided an autocorrect array, use it
if ( isset($wp_cockneyreplace) ) {
$cockney = array_keys($wp_cockneyreplace);
$cockneyreplace = array_values($wp_cockneyreplace);
} else {
$cockney = array("'tain't","'twere","'twas","'tis","'twill","'til","'bout","'nuff","'round","'cause");
$cockneyreplace = array("’tain’t","’twere","’twas","’tis","’twill","’til","’bout","’nuff","’round","’cause");
}
$static_characters = array_merge(array('---', ' -- ', '--', ' - ', 'xn–', '...', '``', '\'s', '\'\'', ' (tm)'), $cockney);
$static_replacements = array_merge(array('—', ' — ', '–', ' – ', 'xn--', '…', $opening_quote, '’s', $closing_quote, ' ™'), $cockneyreplace);
$dynamic_characters = array('/\'(\d\d(?:’|\')?s)/', '/(\s|\A|[([{<]|")\'/', '/(\d+)"/', '/(\d+)\'/', '/(\S)\'([^\'\s])/', '/(\s|\A|[([{<])"(?!\s)/', '/"(\s|\S|\Z)/', '/\'([\s.]|\Z)/', '/(\d+)x(\d+)/');
$dynamic_replacements = array('’$1','$1‘', '$1″', '$1′', '$1’$2', '$1' . $opening_quote . '$2', $closing_quote . '$1', '’$1', '$1×$2');
$static_setup = true;
}
// Transform into regexp sub-expression used in _wptexturize_pushpop_element
// Must do this everytime in case plugins use these filters in a context sensitive manner
$no_texturize_tags = '(' . implode('|', apply_filters('no_texturize_tags', $default_no_texturize_tags) ) . ')';
$no_texturize_shortcodes = '(' . implode('|', apply_filters('no_texturize_shortcodes', $default_no_texturize_shortcodes) ) . ')';
$no_texturize_tags_stack = array();
$no_texturize_shortcodes_stack = array();
for ( $i = 0; $i < $stop; $i++ ) {
$curl = $textarr[$i];
if ( !empty($curl) && '<' != $curl{0} && '[' != $curl{0}
&& empty($no_texturize_shortcodes_stack) && empty($no_texturize_tags_stack)) {
// This is not a tag, nor is the texturization disabled
// static strings
$curl = str_replace($static_characters, $static_replacements, $curl);
// regular expressions
$curl = preg_replace($dynamic_characters, $dynamic_replacements, $curl);
} elseif (!empty($curl)) {
/*
* Only call _wptexturize_pushpop_element if first char is correct
* tag opening
*/
if ('<' == $curl{0})
_wptexturize_pushpop_element($curl, $no_texturize_tags_stack, $no_texturize_tags, '<', '>');
elseif ('[' == $curl{0})
_wptexturize_pushpop_element($curl, $no_texturize_shortcodes_stack, $no_texturize_shortcodes, '[', ']');
}
$curl = preg_replace('/&([^#])(?![a-zA-Z1-4]{1,8};)/', '&$1', $curl);
$output .= $curl;
}
return $output;
}
/**
* Search for disabled element tags. Push element to stack on tag open and pop
* on tag close. Assumes first character of $text is tag opening.
*
* @access private
* @since 2.9.0
*
* @param string $text Text to check. First character is assumed to be $opening
* @param array $stack Array used as stack of opened tag elements
* @param string $disabled_elements Tags to match against formatted as regexp sub-expression
* @param string $opening Tag opening character, assumed to be 1 character long
* @param string $opening Tag closing character
* @return object
*/
function _wptexturize_pushpop_element($text, &$stack, $disabled_elements, $opening = '<', $closing = '>') {
// Check if it is a closing tag -- otherwise assume opening tag
if (strncmp($opening . '/', $text, 2)) {
// Opening? Check $text+1 against disabled elements
if (preg_match('/^' . $disabled_elements . '\b/', substr($text, 1), $matches)) {
/*
* This disables texturize until we find a closing tag of our type
* (e.g. <pre>) even if there was invalid nesting before that
*
* Example: in the case <pre>sadsadasd</code>"baba"</pre>
* "baba" won't be texturize
*/
array_push($stack, $matches[1]);
}
} else {
// Closing? Check $text+2 against disabled elements
$c = preg_quote($closing, '/');
if (preg_match('/^' . $disabled_elements . $c . '/', substr($text, 2), $matches)) {
$last = array_pop($stack);
// Make sure it matches the opening tag
if ($last != $matches[1])
array_push($stack, $last);
}
}
}
/**
* Accepts matches array from preg_replace_callback in wpautop() or a string.
*
* Ensures that the contents of a <<pre>>...<</pre>> HTML block are not
* converted into paragraphs or line-breaks.
*
* @since 1.2.0
*
* @param array|string $matches The array or string
* @return string The pre block without paragraph/line-break conversion.
*/
function clean_pre($matches) {
if ( is_array($matches) )
$text = $matches[1] . $matches[2] . "</pre>";
else
$text = $matches;
$text = str_replace('<br />', '', $text);
$text = str_replace('<p>', "\n", $text);
$text = str_replace('</p>', '', $text);
return $text;
}
/**
* Replaces double line-breaks with paragraph elements.
*
* A group of regex replaces used to identify text formatted with newlines and
* replace double line-breaks with HTML paragraph tags. The remaining
* line-breaks after conversion become <<br />> tags, unless $br is set to '0'
* or 'false'.
*
* @since 0.71
*
* @param string $pee The text which has to be formatted.
* @param int|bool $br Optional. If set, this will convert all remaining line-breaks after paragraphing. Default true.
* @return string Text which has been converted into correct paragraph tags.
*/
function wpautop($pee, $br = 1) {
if ( trim($pee) === '' )
return '';
$pee = $pee . "\n"; // just to make things a little easier, pad the end
$pee = preg_replace('|<br />\s*<br />|', "\n\n", $pee);
// Space things out a little
$allblocks = '(?:table|thead|tfoot|caption|col|colgroup|tbody|tr|td|th|div|dl|dd|dt|ul|ol|li|pre|select|form|map|area|blockquote|address|math|style|input|p|h[1-6]|hr|fieldset|legend)';
$pee = preg_replace('!(<' . $allblocks . '[^>]*>)!', "\n$1", $pee);
$pee = preg_replace('!(</' . $allblocks . '>)!', "$1\n\n", $pee);
$pee = str_replace(array("\r\n", "\r"), "\n", $pee); // cross-platform newlines
if ( strpos($pee, '<object') !== false ) {
$pee = preg_replace('|\s*<param([^>]*)>\s*|', "<param$1>", $pee); // no pee inside object/embed
$pee = preg_replace('|\s*</embed>\s*|', '</embed>', $pee);
}
$pee = preg_replace("/\n\n+/", "\n\n", $pee); // take care of duplicates
// make paragraphs, including one at the end
$pees = preg_split('/\n\s*\n/', $pee, -1, PREG_SPLIT_NO_EMPTY);
$pee = '';
foreach ( $pees as $tinkle )
$pee .= '<p>' . trim($tinkle, "\n") . "</p>\n";
$pee = preg_replace('|<p>\s*</p>|', '', $pee); // under certain strange conditions it could create a P of entirely whitespace
$pee = preg_replace('!<p>([^<]+)</(div|address|form)>!', "<p>$1</p></$2>", $pee);
$pee = preg_replace('!<p>\s*(</?' . $allblocks . '[^>]*>)\s*</p>!', "$1", $pee); // don't pee all over a tag
$pee = preg_replace("|<p>(<li.+?)</p>|", "$1", $pee); // problem with nested lists
$pee = preg_replace('|<p><blockquote([^>]*)>|i', "<blockquote$1><p>", $pee);
$pee = str_replace('</blockquote></p>', '</p></blockquote>', $pee);
$pee = preg_replace('!<p>\s*(</?' . $allblocks . '[^>]*>)!', "$1", $pee);
$pee = preg_replace('!(</?' . $allblocks . '[^>]*>)\s*</p>!', "$1", $pee);
if ($br) {
$pee = preg_replace_callback('/<(script|style).*?<\/\\1>/s', create_function('$matches', 'return str_replace("\n", "<WPPreserveNewline />", $matches[0]);'), $pee);
$pee = preg_replace('|(?<!<br />)\s*\n|', "<br />\n", $pee); // optionally make line breaks
$pee = str_replace('<WPPreserveNewline />', "\n", $pee);
}
$pee = preg_replace('!(</?' . $allblocks . '[^>]*>)\s*<br />!', "$1", $pee);
$pee = preg_replace('!<br />(\s*</?(?:p|li|div|dl|dd|dt|th|pre|td|ul|ol)[^>]*>)!', '$1', $pee);
if (strpos($pee, '<pre') !== false)
$pee = preg_replace_callback('!(<pre[^>]*>)(.*?)</pre>!is', 'clean_pre', $pee );
$pee = preg_replace( "|\n</p>$|", '</p>', $pee );
return $pee;
}
/**
* Don't auto-p wrap shortcodes that stand alone
*
* Ensures that shortcodes are not wrapped in <<p>>...<</p>>.
*
* @since 2.9.0
*
* @param string $pee The content.
* @return string The filtered content.
*/
function shortcode_unautop($pee) {
global $shortcode_tags;
if ( !empty($shortcode_tags) && is_array($shortcode_tags) ) {
$tagnames = array_keys($shortcode_tags);
$tagregexp = join( '|', array_map('preg_quote', $tagnames) );
$pee = preg_replace('/<p>\\s*?(\\[(' . $tagregexp . ')\\b.*?\\/?\\](?:.+?\\[\\/\\2\\])?)\\s*<\\/p>/s', '$1', $pee);
}
return $pee;
}
/**
* Checks to see if a string is utf8 encoded.
*
* NOTE: This function checks for 5-Byte sequences, UTF8
* has Bytes Sequences with a maximum length of 4.
*
* @author bmorel at ssi dot fr (modified)
* @since 1.2.1
*
* @param string $str The string to be checked
* @return bool True if $str fits a UTF-8 model, false otherwise.
*/
function seems_utf8($str) {
$length = strlen($str);
for ($i=0; $i < $length; $i++) {
$c = ord($str[$i]);
if ($c < 0x80) $n = 0; # 0bbbbbbb
elseif (($c & 0xE0) == 0xC0) $n=1; # 110bbbbb
elseif (($c & 0xF0) == 0xE0) $n=2; # 1110bbbb
elseif (($c & 0xF8) == 0xF0) $n=3; # 11110bbb
elseif (($c & 0xFC) == 0xF8) $n=4; # 111110bb
elseif (($c & 0xFE) == 0xFC) $n=5; # 1111110b
else return false; # Does not match any model
for ($j=0; $j<$n; $j++) { # n bytes matching 10bbbbbb follow ?
if ((++$i == $length) || ((ord($str[$i]) & 0xC0) != 0x80))
return false;
}
}
return true;
}
/**
* Converts a number of special characters into their HTML entities.
*
* Specifically deals with: &, <, >, ", and '.
*
* $quote_style can be set to ENT_COMPAT to encode " to
* ", or ENT_QUOTES to do both. Default is ENT_NOQUOTES where no quotes are encoded.
*
* @since 1.2.2
*
* @param string $string The text which is to be encoded.
* @param mixed $quote_style Optional. Converts double quotes if set to ENT_COMPAT, both single and double if set to ENT_QUOTES or none if set to ENT_NOQUOTES. Also compatible with old values; converting single quotes if set to 'single', double if set to 'double' or both if otherwise set. Default is ENT_NOQUOTES.
* @param string $charset Optional. The character encoding of the string. Default is false.
* @param boolean $double_encode Optional. Whether or not to encode existing html entities. Default is false.
* @return string The encoded text with HTML entities.
*/
function _wp_specialchars( $string, $quote_style = ENT_NOQUOTES, $charset = false, $double_encode = false ) {
$string = (string) $string;
if ( 0 === strlen( $string ) ) {
return '';
}
// Don't bother if there are no specialchars - saves some processing
if ( !preg_match( '/[&<>"\']/', $string ) ) {
return $string;
}
// Account for the previous behaviour of the function when the $quote_style is not an accepted value
if ( empty( $quote_style ) ) {
$quote_style = ENT_NOQUOTES;
} elseif ( !in_array( $quote_style, array( 0, 2, 3, 'single', 'double' ), true ) ) {
$quote_style = ENT_QUOTES;
}
// Store the site charset as a static to avoid multiple calls to wp_load_alloptions()
if ( !$charset ) {
static $_charset;
if ( !isset( $_charset ) ) {
$alloptions = wp_load_alloptions();
$_charset = isset( $alloptions['blog_charset'] ) ? $alloptions['blog_charset'] : '';
}
$charset = $_charset;
}
if ( in_array( $charset, array( 'utf8', 'utf-8', 'UTF8' ) ) ) {
$charset = 'UTF-8';
}
$_quote_style = $quote_style;
if ( $quote_style === 'double' ) {
$quote_style = ENT_COMPAT;
$_quote_style = ENT_COMPAT;
} elseif ( $quote_style === 'single' ) {
$quote_style = ENT_NOQUOTES;
}
// Handle double encoding ourselves
if ( !$double_encode ) {
$string = wp_specialchars_decode( $string, $_quote_style );
$string = preg_replace( '/&(#?x?[0-9a-z]+);/i', '|wp_entity|$1|/wp_entity|', $string );
}
$string = @htmlspecialchars( $string, $quote_style, $charset );
// Handle double encoding ourselves
if ( !$double_encode ) {
$string = str_replace( array( '|wp_entity|', '|/wp_entity|' ), array( '&', ';' ), $string );
}
// Backwards compatibility
if ( 'single' === $_quote_style ) {
$string = str_replace( "'", ''', $string );
}
return $string;
}
/**
* Converts a number of HTML entities into their special characters.
*
* Specifically deals with: &, <, >, ", and '.
*
* $quote_style can be set to ENT_COMPAT to decode " entities,
* or ENT_QUOTES to do both " and '. Default is ENT_NOQUOTES where no quotes are decoded.
*
* @since 2.8
*
* @param string $string The text which is to be decoded.
* @param mixed $quote_style Optional. Converts double quotes if set to ENT_COMPAT, both single and double if set to ENT_QUOTES or none if set to ENT_NOQUOTES. Also compatible with old _wp_specialchars() values; converting single quotes if set to 'single', double if set to 'double' or both if otherwise set. Default is ENT_NOQUOTES.
* @return string The decoded text without HTML entities.
*/
function wp_specialchars_decode( $string, $quote_style = ENT_NOQUOTES ) {
$string = (string) $string;
if ( 0 === strlen( $string ) ) {
return '';
}
// Don't bother if there are no entities - saves a lot of processing
if ( strpos( $string, '&' ) === false ) {
return $string;
}
// Match the previous behaviour of _wp_specialchars() when the $quote_style is not an accepted value
if ( empty( $quote_style ) ) {
$quote_style = ENT_NOQUOTES;
} elseif ( !in_array( $quote_style, array( 0, 2, 3, 'single', 'double' ), true ) ) {
$quote_style = ENT_QUOTES;
}
// More complete than get_html_translation_table( HTML_SPECIALCHARS )
$single = array( ''' => '\'', ''' => '\'' );
$single_preg = array( '/�*39;/' => ''', '/�*27;/i' => ''' );
$double = array( '"' => '"', '"' => '"', '"' => '"' );
$double_preg = array( '/�*34;/' => '"', '/�*22;/i' => '"' );
$others = array( '<' => '<', '<' => '<', '>' => '>', '>' => '>', '&' => '&', '&' => '&', '&' => '&' );
$others_preg = array( '/�*60;/' => '<', '/�*62;/' => '>', '/�*38;/' => '&', '/�*26;/i' => '&' );
if ( $quote_style === ENT_QUOTES ) {
$translation = array_merge( $single, $double, $others );
$translation_preg = array_merge( $single_preg, $double_preg, $others_preg );
} elseif ( $quote_style === ENT_COMPAT || $quote_style === 'double' ) {
$translation = array_merge( $double, $others );
$translation_preg = array_merge( $double_preg, $others_preg );
} elseif ( $quote_style === 'single' ) {
$translation = array_merge( $single, $others );
$translation_preg = array_merge( $single_preg, $others_preg );
} elseif ( $quote_style === ENT_NOQUOTES ) {
$translation = $others;
$translation_preg = $others_preg;
}
// Remove zero padding on numeric entities
$string = preg_replace( array_keys( $translation_preg ), array_values( $translation_preg ), $string );
// Replace characters according to translation table
return strtr( $string, $translation );
}
/**
* Checks for invalid UTF8 in a string.
*
* @since 2.8
*
* @param string $string The text which is to be checked.
* @param boolean $strip Optional. Whether to attempt to strip out invalid UTF8. Default is false.
* @return string The checked text.
*/
function wp_check_invalid_utf8( $string, $strip = false ) {
$string = (string) $string;
if ( 0 === strlen( $string ) ) {
return '';
}
// Store the site charset as a static to avoid multiple calls to get_option()
static $is_utf8;
if ( !isset( $is_utf8 ) ) {
$is_utf8 = in_array( get_option( 'blog_charset' ), array( 'utf8', 'utf-8', 'UTF8', 'UTF-8' ) );
}
if ( !$is_utf8 ) {
return $string;
}
// Check for support for utf8 in the installed PCRE library once and store the result in a static
static $utf8_pcre;
if ( !isset( $utf8_pcre ) ) {
$utf8_pcre = @preg_match( '/^./u', 'a' );
}
// We can't demand utf8 in the PCRE installation, so just return the string in those cases
if ( !$utf8_pcre ) {
return $string;
}
// preg_match fails when it encounters invalid UTF8 in $string
if ( 1 === @preg_match( '/^./us', $string ) ) {
return $string;
}
// Attempt to strip the bad chars if requested (not recommended)
if ( $strip && function_exists( 'iconv' ) ) {
return iconv( 'utf-8', 'utf-8', $string );
}
return '';
}
/**
* Encode the Unicode values to be used in the URI.
*
* @since 1.5.0
*
* @param string $utf8_string
* @param int $length Max length of the string
* @return string String with Unicode encoded for URI.
*/
function utf8_uri_encode( $utf8_string, $length = 0 ) {
$unicode = '';
$values = array();
$num_octets = 1;
$unicode_length = 0;
$string_length = strlen( $utf8_string );
for ($i = 0; $i < $string_length; $i++ ) {
$value = ord( $utf8_string[ $i ] );
if ( $value < 128 ) {
if ( $length && ( $unicode_length >= $length ) )
break;
$unicode .= chr($value);
$unicode_length++;
} else {
if ( count( $values ) == 0 ) $num_octets = ( $value < 224 ) ? 2 : 3;
$values[] = $value;
if ( $length && ( $unicode_length + ($num_octets * 3) ) > $length )
break;
if ( count( $values ) == $num_octets ) {
if ($num_octets == 3) {
$unicode .= '%' . dechex($values[0]) . '%' . dechex($values[1]) . '%' . dechex($values[2]);
$unicode_length += 9;
} else {
$unicode .= '%' . dechex($values[0]) . '%' . dechex($values[1]);
$unicode_length += 6;
}
$values = array();
$num_octets = 1;
}
}
}
return $unicode;
}
/**
* Converts all accent characters to ASCII characters.
*
* If there are no accent characters, then the string given is just returned.
*
* @since 1.2.1
*
* @param string $string Text that might have accent characters
* @return string Filtered string with replaced "nice" characters.
*/
function remove_accents($string) {
if ( !preg_match('/[\x80-\xff]/', $string) )
return $string;
if (seems_utf8($string)) {
$chars = array(
// Decompositions for Latin-1 Supplement
chr(195).chr(128) => 'A', chr(195).chr(129) => 'A',
chr(195).chr(130) => 'A', chr(195).chr(131) => 'A',
chr(195).chr(132) => 'A', chr(195).chr(133) => 'A',
chr(195).chr(135) => 'C', chr(195).chr(136) => 'E',
chr(195).chr(137) => 'E', chr(195).chr(138) => 'E',
chr(195).chr(139) => 'E', chr(195).chr(140) => 'I',
chr(195).chr(141) => 'I', chr(195).chr(142) => 'I',
chr(195).chr(143) => 'I', chr(195).chr(145) => 'N',
chr(195).chr(146) => 'O', chr(195).chr(147) => 'O',
chr(195).chr(148) => 'O', chr(195).chr(149) => 'O',
chr(195).chr(150) => 'O', chr(195).chr(153) => 'U',
chr(195).chr(154) => 'U', chr(195).chr(155) => 'U',
chr(195).chr(156) => 'U', chr(195).chr(157) => 'Y',
chr(195).chr(159) => 's', chr(195).chr(160) => 'a',
chr(195).chr(161) => 'a', chr(195).chr(162) => 'a',
chr(195).chr(163) => 'a', chr(195).chr(164) => 'a',
chr(195).chr(165) => 'a', chr(195).chr(167) => 'c',
chr(195).chr(168) => 'e', chr(195).chr(169) => 'e',
chr(195).chr(170) => 'e', chr(195).chr(171) => 'e',
chr(195).chr(172) => 'i', chr(195).chr(173) => 'i',
chr(195).chr(174) => 'i', chr(195).chr(175) => 'i',
chr(195).chr(177) => 'n', chr(195).chr(178) => 'o',
chr(195).chr(179) => 'o', chr(195).chr(180) => 'o',
chr(195).chr(181) => 'o', chr(195).chr(182) => 'o',
chr(195).chr(182) => 'o', chr(195).chr(185) => 'u',
chr(195).chr(186) => 'u', chr(195).chr(187) => 'u',
chr(195).chr(188) => 'u', chr(195).chr(189) => 'y',
chr(195).chr(191) => 'y',
// Decompositions for Latin Extended-A
chr(196).chr(128) => 'A', chr(196).chr(129) => 'a',
chr(196).chr(130) => 'A', chr(196).chr(131) => 'a',
chr(196).chr(132) => 'A', chr(196).chr(133) => 'a',
chr(196).chr(134) => 'C', chr(196).chr(135) => 'c',
chr(196).chr(136) => 'C', chr(196).chr(137) => 'c',
chr(196).chr(138) => 'C', chr(196).chr(139) => 'c',
chr(196).chr(140) => 'C', chr(196).chr(141) => 'c',
chr(196).chr(142) => 'D', chr(196).chr(143) => 'd',
chr(196).chr(144) => 'D', chr(196).chr(145) => 'd',
chr(196).chr(146) => 'E', chr(196).chr(147) => 'e',
chr(196).chr(148) => 'E', chr(196).chr(149) => 'e',
chr(196).chr(150) => 'E', chr(196).chr(151) => 'e',
chr(196).chr(152) => 'E', chr(196).chr(153) => 'e',
chr(196).chr(154) => 'E', chr(196).chr(155) => 'e',
chr(196).chr(156) => 'G', chr(196).chr(157) => 'g',
chr(196).chr(158) => 'G', chr(196).chr(159) => 'g',
chr(196).chr(160) => 'G', chr(196).chr(161) => 'g',
chr(196).chr(162) => 'G', chr(196).chr(163) => 'g',
chr(196).chr(164) => 'H', chr(196).chr(165) => 'h',
chr(196).chr(166) => 'H', chr(196).chr(167) => 'h',
chr(196).chr(168) => 'I', chr(196).chr(169) => 'i',
chr(196).chr(170) => 'I', chr(196).chr(171) => 'i',
chr(196).chr(172) => 'I', chr(196).chr(173) => 'i',
chr(196).chr(174) => 'I', chr(196).chr(175) => 'i',
chr(196).chr(176) => 'I', chr(196).chr(177) => 'i',
chr(196).chr(178) => 'IJ',chr(196).chr(179) => 'ij',
chr(196).chr(180) => 'J', chr(196).chr(181) => 'j',
chr(196).chr(182) => 'K', chr(196).chr(183) => 'k',
chr(196).chr(184) => 'k', chr(196).chr(185) => 'L',
chr(196).chr(186) => 'l', chr(196).chr(187) => 'L',
chr(196).chr(188) => 'l', chr(196).chr(189) => 'L',
chr(196).chr(190) => 'l', chr(196).chr(191) => 'L',
chr(197).chr(128) => 'l', chr(197).chr(129) => 'L',
chr(197).chr(130) => 'l', chr(197).chr(131) => 'N',
chr(197).chr(132) => 'n', chr(197).chr(133) => 'N',
chr(197).chr(134) => 'n', chr(197).chr(135) => 'N',
chr(197).chr(136) => 'n', chr(197).chr(137) => 'N',
chr(197).chr(138) => 'n', chr(197).chr(139) => 'N',
chr(197).chr(140) => 'O', chr(197).chr(141) => 'o',
chr(197).chr(142) => 'O', chr(197).chr(143) => 'o',
chr(197).chr(144) => 'O', chr(197).chr(145) => 'o',
chr(197).chr(146) => 'OE',chr(197).chr(147) => 'oe',
chr(197).chr(148) => 'R',chr(197).chr(149) => 'r',
chr(197).chr(150) => 'R',chr(197).chr(151) => 'r',
chr(197).chr(152) => 'R',chr(197).chr(153) => 'r',
chr(197).chr(154) => 'S',chr(197).chr(155) => 's',
chr(197).chr(156) => 'S',chr(197).chr(157) => 's',
chr(197).chr(158) => 'S',chr(197).chr(159) => 's',
chr(197).chr(160) => 'S', chr(197).chr(161) => 's',
chr(197).chr(162) => 'T', chr(197).chr(163) => 't',
chr(197).chr(164) => 'T', chr(197).chr(165) => 't',
chr(197).chr(166) => 'T', chr(197).chr(167) => 't',
chr(197).chr(168) => 'U', chr(197).chr(169) => 'u',
chr(197).chr(170) => 'U', chr(197).chr(171) => 'u',
chr(197).chr(172) => 'U', chr(197).chr(173) => 'u',
chr(197).chr(174) => 'U', chr(197).chr(175) => 'u',
chr(197).chr(176) => 'U', chr(197).chr(177) => 'u',
chr(197).chr(178) => 'U', chr(197).chr(179) => 'u',
chr(197).chr(180) => 'W', chr(197).chr(181) => 'w',
chr(197).chr(182) => 'Y', chr(197).chr(183) => 'y',
chr(197).chr(184) => 'Y', chr(197).chr(185) => 'Z',
chr(197).chr(186) => 'z', chr(197).chr(187) => 'Z',
chr(197).chr(188) => 'z', chr(197).chr(189) => 'Z',
chr(197).chr(190) => 'z', chr(197).chr(191) => 's',
// Euro Sign
chr(226).chr(130).chr(172) => 'E',
// GBP (Pound) Sign
chr(194).chr(163) => '');
$string = strtr($string, $chars);
} else {
// Assume ISO-8859-1 if not UTF-8
$chars['in'] = chr(128).chr(131).chr(138).chr(142).chr(154).chr(158)
.chr(159).chr(162).chr(165).chr(181).chr(192).chr(193).chr(194)
.chr(195).chr(196).chr(197).chr(199).chr(200).chr(201).chr(202)
.chr(203).chr(204).chr(205).chr(206).chr(207).chr(209).chr(210)
.chr(211).chr(212).chr(213).chr(214).chr(216).chr(217).chr(218)
.chr(219).chr(220).chr(221).chr(224).chr(225).chr(226).chr(227)
.chr(228).chr(229).chr(231).chr(232).chr(233).chr(234).chr(235)
.chr(236).chr(237).chr(238).chr(239).chr(241).chr(242).chr(243)
.chr(244).chr(245).chr(246).chr(248).chr(249).chr(250).chr(251)
.chr(252).chr(253).chr(255);
$chars['out'] = "EfSZszYcYuAAAAAACEEEEIIIINOOOOOOUUUUYaaaaaaceeeeiiiinoooooouuuuyy";
$string = strtr($string, $chars['in'], $chars['out']);
$double_chars['in'] = array(chr(140), chr(156), chr(198), chr(208), chr(222), chr(223), chr(230), chr(240), chr(254));
$double_chars['out'] = array('OE', 'oe', 'AE', 'DH', 'TH', 'ss', 'ae', 'dh', 'th');
$string = str_replace($double_chars['in'], $double_chars['out'], $string);
}
return $string;
}
/**
* Sanitizes a filename replacing whitespace with dashes
*
* Removes special characters that are illegal in filenames on certain
* operating systems and special characters requiring special escaping
* to manipulate at the command line. Replaces spaces and consecutive
* dashes with a single dash. Trim period, dash and underscore from beginning
* and end of filename.
*
* @since 2.1.0
*
* @param string $filename The filename to be sanitized
* @return string The sanitized filename
*/
function sanitize_file_name( $filename ) {
$filename_raw = $filename;
$special_chars = array("?", "[", "]", "/", "\\", "=", "<", ">", ":", ";", ",", "'", "\"", "&", "$", "#", "*", "(", ")", "|", "~", "`", "!", "{", "}", chr(0));
$special_chars = apply_filters('sanitize_file_name_chars', $special_chars, $filename_raw);
$filename = str_replace($special_chars, '', $filename);
$filename = preg_replace('/[\s-]+/', '-', $filename);
$filename = trim($filename, '.-_');
// Split the filename into a base and extension[s]
$parts = explode('.', $filename);
// Return if only one extension
if ( count($parts) <= 2 )
return apply_filters('sanitize_file_name', $filename, $filename_raw);
// Process multiple extensions
$filename = array_shift($parts);
$extension = array_pop($parts);
$mimes = get_allowed_mime_types();
// Loop over any intermediate extensions. Munge them with a trailing underscore if they are a 2 - 5 character
// long alpha string not in the extension whitelist.
foreach ( (array) $parts as $part) {
$filename .= '.' . $part;
if ( preg_match("/^[a-zA-Z]{2,5}\d?$/", $part) ) {
$allowed = false;
foreach ( $mimes as $ext_preg => $mime_match ) {
$ext_preg = '!(^' . $ext_preg . ')$!i';
if ( preg_match( $ext_preg, $part ) ) {
$allowed = true;
break;
}
}
if ( !$allowed )
$filename .= '_';
}
}
$filename .= '.' . $extension;
return apply_filters('sanitize_file_name', $filename, $filename_raw);
}
/**
* Sanitize username stripping out unsafe characters.
*
* If $strict is true, only alphanumeric characters (as well as _, space, ., -,
* @) are returned.
* Removes tags, octets, entities, and if strict is enabled, will remove all
* non-ASCII characters. After sanitizing, it passes the username, raw username
* (the username in the parameter), and the strict parameter as parameters for
* the filter.
*
* @since 2.0.0
* @uses apply_filters() Calls 'sanitize_user' hook on username, raw username,
* and $strict parameter.
*
* @param string $username The username to be sanitized.
* @param bool $strict If set limits $username to specific characters. Default false.
* @return string The sanitized username, after passing through filters.
*/
function sanitize_user( $username, $strict = false ) {
$raw_username = $username;
$username = wp_strip_all_tags($username);
// Kill octets
$username = preg_replace('|%([a-fA-F0-9][a-fA-F0-9])|', '', $username);
$username = preg_replace('/&.+?;/', '', $username); // Kill entities
// If strict, reduce to ASCII for max portability.
if ( $strict )
$username = preg_replace('|[^a-z0-9 _.\-@]|i', '', $username);
// Consolidate contiguous whitespace
$username = preg_replace('|\s+|', ' ', $username);
return apply_filters('sanitize_user', $username, $raw_username, $strict);
}
/**
* Sanitizes title or use fallback title.
*
* Specifically, HTML and PHP tags are stripped. Further actions can be added
* via the plugin API. If $title is empty and $fallback_title is set, the latter
* will be used.
*
* @since 1.0.0
*
* @param string $title The string to be sanitized.
* @param string $fallback_title Optional. A title to use if $title is empty.
* @return string The sanitized string.
*/
function sanitize_title($title, $fallback_title = '') {
$raw_title = $title;
$title = strip_tags($title);
$title = apply_filters('sanitize_title', $title, $raw_title);
if ( '' === $title || false === $title )
$title = $fallback_title;
return $title;
}
/**
* Sanitizes title, replacing whitespace with dashes.
*
* Limits the output to alphanumeric characters, underscore (_) and dash (-).
* Whitespace becomes a dash.
*
* @since 1.2.0
*
* @param string $title The title to be sanitized.
* @return string The sanitized title.
*/
function sanitize_title_with_dashes($title) {
$title = strip_tags($title);
// Preserve escaped octets.
$title = preg_replace('|%([a-fA-F0-9][a-fA-F0-9])|', '---$1---', $title);
// Remove percent signs that are not part of an octet.
$title = str_replace('%', '', $title);
// Restore octets.
$title = preg_replace('|---([a-fA-F0-9][a-fA-F0-9])---|', '%$1', $title);
$title = remove_accents($title);
if (seems_utf8($title)) {
if (function_exists('mb_strtolower')) {
$title = mb_strtolower($title, 'UTF-8');
}
$title = utf8_uri_encode($title, 200);
}
$title = strtolower($title);
$title = preg_replace('/&.+?;/', '', $title); // kill entities
$title = str_replace('.', '-', $title);
$title = preg_replace('/[^%a-z0-9 _-]/', '', $title);
$title = preg_replace('/\s+/', '-', $title);
$title = preg_replace('|-+|', '-', $title);
$title = trim($title, '-');
return $title;
}
/**
* Ensures a string is a valid SQL order by clause.
*
* Accepts one or more columns, with or without ASC/DESC, and also accepts
* RAND().
*
* @since 2.5.1
*
* @param string $orderby Order by string to be checked.
* @return string|false Returns the order by clause if it is a match, false otherwise.
*/
function sanitize_sql_orderby( $orderby ){
preg_match('/^\s*([a-z0-9_]+(\s+(ASC|DESC))?(\s*,\s*|\s*$))+|^\s*RAND\(\s*\)\s*$/i', $orderby, $obmatches);
if ( !$obmatches )
return false;
return $orderby;
}
/**
* Santizes a html classname to ensure it only contains valid characters
*
* Strips the string down to A-Z,a-z,0-9,'-' if this results in an empty
* string then it will return the alternative value supplied.
*
* @todo Expand to support the full range of CDATA that a class attribute can contain.
*
* @since 2.8.0
*
* @param string $class The classname to be sanitized
* @param string $fallback The value to return if the sanitization end's up as an empty string.
* @return string The sanitized value
*/
function sanitize_html_class($class, $fallback){
//Strip out any % encoded octets
$sanitized = preg_replace('|%[a-fA-F0-9][a-fA-F0-9]|', '', $class);
//Limit to A-Z,a-z,0-9,'-'
$sanitized = preg_replace('/[^A-Za-z0-9-]/', '', $sanitized);
if ('' == $sanitized)
$sanitized = $fallback;
return apply_filters('sanitize_html_class',$sanitized, $class, $fallback);
}
/**
* Converts a number of characters from a string.
*
* Metadata tags <<title>> and <<category>> are removed, <<br>> and <<hr>> are
* converted into correct XHTML and Unicode characters are converted to the
* valid range.
*
* @since 0.71
*
* @param string $content String of characters to be converted.
* @param string $deprecated Not used.
* @return string Converted string.
*/
function convert_chars($content, $deprecated = '') {
// Translation of invalid Unicode references range to valid range
$wp_htmltranswinuni = array(
'€' => '€', // the Euro sign
'' => '',
'‚' => '‚', // these are Windows CP1252 specific characters
'ƒ' => 'ƒ', // they would look weird on non-Windows browsers
'„' => '„',
'…' => '…',
'†' => '†',
'‡' => '‡',
'ˆ' => 'ˆ',
'‰' => '‰',
'Š' => 'Š',
'‹' => '‹',
'Œ' => 'Œ',
'' => '',
'Ž' => 'ž',
'' => '',
'' => '',
'‘' => '‘',
'’' => '’',
'“' => '“',
'”' => '”',
'•' => '•',
'–' => '–',
'—' => '—',
'˜' => '˜',
'™' => '™',
'š' => 'š',
'›' => '›',
'œ' => 'œ',
'' => '',
'ž' => '',
'Ÿ' => 'Ÿ'
);
// Remove metadata tags
$content = preg_replace('/<title>(.+?)<\/title>/','',$content);
$content = preg_replace('/<category>(.+?)<\/category>/','',$content);
// Converts lone & characters into & (a.k.a. &)
$content = preg_replace('/&([^#])(?![a-z1-4]{1,8};)/i', '&$1', $content);
// Fix Word pasting
$content = strtr($content, $wp_htmltranswinuni);
// Just a little XHTML help
$content = str_replace('<br>', '<br />', $content);
$content = str_replace('<hr>', '<hr />', $content);
return $content;
}
/**
* Callback used to change %uXXXX to &#YYY; syntax
*
* @since 2.8?
*
* @param array $matches Single Match
* @return string An HTML entity
*/
function funky_javascript_callback($matches) {
return "&#".base_convert($matches[1],16,10).";";
}
/**
* Fixes javascript bugs in browsers.
*
* Converts unicode characters to HTML numbered entities.
*
* @since 1.5.0
* @uses $is_macIE
* @uses $is_winIE
*
* @param string $text Text to be made safe.
* @return string Fixed text.
*/
function funky_javascript_fix($text) {
// Fixes for browsers' javascript bugs
global $is_macIE, $is_winIE;
if ( $is_winIE || $is_macIE )
$text = preg_replace_callback("/\%u([0-9A-F]{4,4})/",
"funky_javascript_callback",
$text);
return $text;
}
/**
* Will only balance the tags if forced to and the option is set to balance tags.
*
* The option 'use_balanceTags' is used for whether the tags will be balanced.
* Both the $force parameter and 'use_balanceTags' option will have to be true
* before the tags will be balanced.
*
* @since 0.71
*
* @param string $text Text to be balanced
* @param bool $force Forces balancing, ignoring the value of the option. Default false.
* @return string Balanced text
*/
function balanceTags( $text, $force = false ) {
if ( !$force && get_option('use_balanceTags') == 0 )
return $text;
return force_balance_tags( $text );
}
/**
* Balances tags of string using a modified stack.
*
* @since 2.0.4
*
* @author Leonard Lin <leonard@acm.org>
* @license GPL v2.0
* @copyright November 4, 2001
* @version 1.1
* @todo Make better - change loop condition to $text in 1.2
* @internal Modified by Scott Reilly (coffee2code) 02 Aug 2004
* 1.1 Fixed handling of append/stack pop order of end text
* Added Cleaning Hooks
* 1.0 First Version
*
* @param string $text Text to be balanced.
* @return string Balanced text.
*/
function force_balance_tags( $text ) {
$tagstack = array(); $stacksize = 0; $tagqueue = ''; $newtext = '';
$single_tags = array('br', 'hr', 'img', 'input'); //Known single-entity/self-closing tags
$nestable_tags = array('blockquote', 'div', 'span'); //Tags that can be immediately nested within themselves
# WP bug fix for comments - in case you REALLY meant to type '< !--'
$text = str_replace('< !--', '< !--', $text);
# WP bug fix for LOVE <3 (and other situations with '<' before a number)
$text = preg_replace('#<([0-9]{1})#', '<$1', $text);
while (preg_match("/<(\/?\w*)\s*([^>]*)>/",$text,$regex)) {
$newtext .= $tagqueue;
$i = strpos($text,$regex[0]);
$l = strlen($regex[0]);
// clear the shifter
$tagqueue = '';
// Pop or Push
if ( isset($regex[1][0]) && '/' == $regex[1][0] ) { // End Tag
$tag = strtolower(substr($regex[1],1));
// if too many closing tags
if($stacksize <= 0) {
$tag = '';
//or close to be safe $tag = '/' . $tag;
}
// if stacktop value = tag close value then pop
else if ($tagstack[$stacksize - 1] == $tag) { // found closing tag
$tag = '</' . $tag . '>'; // Close Tag
// Pop
array_pop ($tagstack);
$stacksize--;
} else { // closing tag not at top, search for it
for ($j=$stacksize-1;$j>=0;$j--) {
if ($tagstack[$j] == $tag) {
// add tag to tagqueue
for ($k=$stacksize-1;$k>=$j;$k--){
$tagqueue .= '</' . array_pop ($tagstack) . '>';
$stacksize--;
}
break;
}
}
$tag = '';
}
} else { // Begin Tag
$tag = strtolower($regex[1]);
// Tag Cleaning
// If self-closing or '', don't do anything.
if((substr($regex[2],-1) == '/') || ($tag == '')) {
}
// ElseIf it's a known single-entity tag but it doesn't close itself, do so
elseif ( in_array($tag, $single_tags) ) {
$regex[2] .= '/';
} else { // Push the tag onto the stack
// If the top of the stack is the same as the tag we want to push, close previous tag
if (($stacksize > 0) && !in_array($tag, $nestable_tags) && ($tagstack[$stacksize - 1] == $tag)) {
$tagqueue = '</' . array_pop ($tagstack) . '>';
$stacksize--;
}
$stacksize = array_push ($tagstack, $tag);
}
// Attributes
$attributes = $regex[2];
if($attributes) {
$attributes = ' '.$attributes;
}
$tag = '<'.$tag.$attributes.'>';
//If already queuing a close tag, then put this tag on, too
if ($tagqueue) {
$tagqueue .= $tag;
$tag = '';
}
}
$newtext .= substr($text,0,$i) . $tag;
$text = substr($text,$i+$l);
}
// Clear Tag Queue
$newtext .= $tagqueue;
// Add Remaining text
$newtext .= $text;
// Empty Stack
while($x = array_pop($tagstack)) {
$newtext .= '</' . $x . '>'; // Add remaining tags to close
}
// WP fix for the bug with HTML comments
$newtext = str_replace("< !--","<!--",$newtext);
$newtext = str_replace("< !--","< !--",$newtext);
return $newtext;
}
/**
* Acts on text which is about to be edited.
*
* Unless $richedit is set, it is simply a holder for the 'format_to_edit'
* filter. If $richedit is set true htmlspecialchars() will be run on the
* content, converting special characters to HTMl entities.
*
* @since 0.71
*
* @param string $content The text about to be edited.
* @param bool $richedit Whether or not the $content should pass through htmlspecialchars(). Default false.
* @return string The text after the filter (and possibly htmlspecialchars()) has been run.
*/
function format_to_edit($content, $richedit = false) {
$content = apply_filters('format_to_edit', $content);
if (! $richedit )
$content = htmlspecialchars($content);
return $content;
}
/**
* Holder for the 'format_to_post' filter.
*
* @since 0.71
*
* @param string $content The text to pass through the filter.
* @return string Text returned from the 'format_to_post' filter.
*/
function format_to_post($content) {
$content = apply_filters('format_to_post', $content);
return $content;
}
/**
* Add leading zeros when necessary.
*
* If you set the threshold to '4' and the number is '10', then you will get
* back '0010'. If you set the number to '4' and the number is '5000', then you
* will get back '5000'.
*
* Uses sprintf to append the amount of zeros based on the $threshold parameter
* and the size of the number. If the number is large enough, then no zeros will
* be appended.
*
* @since 0.71
*
* @param mixed $number Number to append zeros to if not greater than threshold.
* @param int $threshold Digit places number needs to be to not have zeros added.
* @return string Adds leading zeros to number if needed.
*/
function zeroise($number, $threshold) {
return sprintf('%0'.$threshold.'s', $number);
}
/**
* Adds backslashes before letters and before a number at the start of a string.
*
* @since 0.71
*
* @param string $string Value to which backslashes will be added.
* @return string String with backslashes inserted.
*/
function backslashit($string) {
$string = preg_replace('/^([0-9])/', '\\\\\\\\\1', $string);
$string = preg_replace('/([a-z])/i', '\\\\\1', $string);
return $string;
}
/**
* Appends a trailing slash.
*
* Will remove trailing slash if it exists already before adding a trailing
* slash. This prevents double slashing a string or path.
*
* The primary use of this is for paths and thus should be used for paths. It is
* not restricted to paths and offers no specific path support.
*
* @since 1.2.0
* @uses untrailingslashit() Unslashes string if it was slashed already.
*
* @param string $string What to add the trailing slash to.
* @return string String with trailing slash added.
*/
function trailingslashit($string) {
return untrailingslashit($string) . '/';
}
/**
* Removes trailing slash if it exists.
*
* The primary use of this is for paths and thus should be used for paths. It is
* not restricted to paths and offers no specific path support.
*
* @since 2.2.0
*
* @param string $string What to remove the trailing slash from.
* @return string String without the trailing slash.
*/
function untrailingslashit($string) {
return rtrim($string, '/');
}
/**
* Adds slashes to escape strings.
*
* Slashes will first be removed if magic_quotes_gpc is set, see {@link
* http://www.php.net/magic_quotes} for more details.
*
* @since 0.71
*
* @param string $gpc The string returned from HTTP request data.
* @return string Returns a string escaped with slashes.
*/
function addslashes_gpc($gpc) {
global $wpdb;
if (get_magic_quotes_gpc()) {
$gpc = stripslashes($gpc);
}
return esc_sql($gpc);
}
/**
* Navigates through an array and removes slashes from the values.
*
* If an array is passed, the array_map() function causes a callback to pass the
* value back to the function. The slashes from this value will removed.
*
* @since 2.0.0
*
* @param array|string $value The array or string to be striped.
* @return array|string Stripped array (or string in the callback).
*/
function stripslashes_deep($value) {
$value = is_array($value) ? array_map('stripslashes_deep', $value) : stripslashes($value);
return $value;
}
/**
* Navigates through an array and encodes the values to be used in a URL.
*
* Uses a callback to pass the value of the array back to the function as a
* string.
*
* @since 2.2.0
*
* @param array|string $value The array or string to be encoded.
* @return array|string $value The encoded array (or string from the callback).
*/
function urlencode_deep($value) {
$value = is_array($value) ? array_map('urlencode_deep', $value) : urlencode($value);
return $value;
}
/**
* Converts email addresses characters to HTML entities to block spam bots.
*
* @since 0.71
*
* @param string $emailaddy Email address.
* @param int $mailto Optional. Range from 0 to 1. Used for encoding.
* @return string Converted email address.
*/
function antispambot($emailaddy, $mailto=0) {
$emailNOSPAMaddy = '';
srand ((float) microtime() * 1000000);
for ($i = 0; $i < strlen($emailaddy); $i = $i + 1) {
$j = floor(rand(0, 1+$mailto));
if ($j==0) {
$emailNOSPAMaddy .= '&#'.ord(substr($emailaddy,$i,1)).';';
} elseif ($j==1) {
$emailNOSPAMaddy .= substr($emailaddy,$i,1);
} elseif ($j==2) {
$emailNOSPAMaddy .= '%'.zeroise(dechex(ord(substr($emailaddy, $i, 1))), 2);
}
}
$emailNOSPAMaddy = str_replace('@','@',$emailNOSPAMaddy);
return $emailNOSPAMaddy;
}
/**
* Callback to convert URI match to HTML A element.
*
* This function was backported from 2.5.0 to 2.3.2. Regex callback for {@link
* make_clickable()}.
*
* @since 2.3.2
* @access private
*
* @param array $matches Single Regex Match.
* @return string HTML A element with URI address.
*/
function _make_url_clickable_cb($matches) {
$url = $matches[2];
$url = esc_url($url);
if ( empty($url) )
return $matches[0];
return $matches[1] . "<a href=\"$url\" rel=\"nofollow\">$url</a>";
}
/**
* Callback to convert URL match to HTML A element.
*
* This function was backported from 2.5.0 to 2.3.2. Regex callback for {@link
* make_clickable()}.
*
* @since 2.3.2
* @access private
*
* @param array $matches Single Regex Match.
* @return string HTML A element with URL address.
*/
function _make_web_ftp_clickable_cb($matches) {
$ret = '';
$dest = $matches[2];
$dest = 'http://' . $dest;
$dest = esc_url($dest);
if ( empty($dest) )
return $matches[0];
// removed trailing [.,;:)] from URL
if ( in_array( substr($dest, -1), array('.', ',', ';', ':', ')') ) === true ) {
$ret = substr($dest, -1);
$dest = substr($dest, 0, strlen($dest)-1);
}
return $matches[1] . "<a href=\"$dest\" rel=\"nofollow\">$dest</a>$ret";
}
/**
* Callback to convert email address match to HTML A element.
*
* This function was backported from 2.5.0 to 2.3.2. Regex callback for {@link
* make_clickable()}.
*
* @since 2.3.2
* @access private
*
* @param array $matches Single Regex Match.
* @return string HTML A element with email address.
*/
function _make_email_clickable_cb($matches) {
$email = $matches[2] . '@' . $matches[3];
return $matches[1] . "<a href=\"mailto:$email\">$email</a>";
}
/**
* Convert plaintext URI to HTML links.
*
* Converts URI, www and ftp, and email addresses. Finishes by fixing links
* within links.
*
* @since 0.71
*
* @param string $ret Content to convert URIs.
* @return string Content with converted URIs.
*/
function make_clickable($ret) {
$ret = ' ' . $ret;
// in testing, using arrays here was found to be faster
$ret = preg_replace_callback('#(?<=[\s>])(\()?([\w]+?://(?:[\w\\x80-\\xff\#$%&~/=?@\[\](+-]|[.,;:](?![\s<]|(\))?([\s]|$))|(?(1)\)(?![\s<.,;:]|$)|\)))+)#is', '_make_url_clickable_cb', $ret);
$ret = preg_replace_callback('#([\s>])((www|ftp)\.[\w\\x80-\\xff\#$%&~/.\-;:=,?@\[\]+]+)#is', '_make_web_ftp_clickable_cb', $ret);
$ret = preg_replace_callback('#([\s>])([.0-9a-z_+-]+)@(([0-9a-z-]+\.)+[0-9a-z]{2,})#i', '_make_email_clickable_cb', $ret);
// this one is not in an array because we need it to run last, for cleanup of accidental links within links
$ret = preg_replace("#(<a( [^>]+?>|>))<a [^>]+?>([^>]+?)</a></a>#i", "$1$3</a>", $ret);
$ret = trim($ret);
return $ret;
}
/**
* Adds rel nofollow string to all HTML A elements in content.
*
* @since 1.5.0
*
* @param string $text Content that may contain HTML A elements.
* @return string Converted content.
*/
function wp_rel_nofollow( $text ) {
global $wpdb;
// This is a pre save filter, so text is already escaped.
$text = stripslashes($text);
$text = preg_replace_callback('|<a (.+?)>|i', 'wp_rel_nofollow_callback', $text);
$text = esc_sql($text);
return $text;
}
/**
* Callback to used to add rel=nofollow string to HTML A element.
*
* Will remove already existing rel="nofollow" and rel='nofollow' from the
* string to prevent from invalidating (X)HTML.
*
* @since 2.3.0
*
* @param array $matches Single Match
* @return string HTML A Element with rel nofollow.
*/
function wp_rel_nofollow_callback( $matches ) {
$text = $matches[1];
$text = str_replace(array(' rel="nofollow"', " rel='nofollow'"), '', $text);
return "<a $text rel=\"nofollow\">";
}
/**
* Convert one smiley code to the icon graphic file equivalent.
*
* Looks up one smiley code in the $wpsmiliestrans global array and returns an
* <img> string for that smiley.
*
* @global array $wpsmiliestrans
* @since 2.8.0
*
* @param string $smiley Smiley code to convert to image.
* @return string Image string for smiley.
*/
function translate_smiley($smiley) {
global $wpsmiliestrans;
if (count($smiley) == 0) {
return '';
}
$siteurl = get_option( 'siteurl' );
$smiley = trim(reset($smiley));
$img = $wpsmiliestrans[$smiley];
$smiley_masked = esc_attr($smiley);
$srcurl = apply_filters('smilies_src', "$siteurl/wp-includes/images/smilies/$img", $img, $siteurl);
return " <img src='$srcurl' alt='$smiley_masked' class='wp-smiley' /> ";
}
/**
* Convert text equivalent of smilies to images.
*
* Will only convert smilies if the option 'use_smilies' is true and the global
* used in the function isn't empty.
*
* @since 0.71
* @uses $wp_smiliessearch
*
* @param string $text Content to convert smilies from text.
* @return string Converted content with text smilies replaced with images.
*/
function convert_smilies($text) {
global $wp_smiliessearch;
$output = '';
if ( get_option('use_smilies') && !empty($wp_smiliessearch) ) {
// HTML loop taken from texturize function, could possible be consolidated
$textarr = preg_split("/(<.*>)/U", $text, -1, PREG_SPLIT_DELIM_CAPTURE); // capture the tags as well as in between
$stop = count($textarr);// loop stuff
for ($i = 0; $i < $stop; $i++) {
$content = $textarr[$i];
if ((strlen($content) > 0) && ('<' != $content{0})) { // If it's not a tag
$content = preg_replace_callback($wp_smiliessearch, 'translate_smiley', $content);
}
$output .= $content;
}
} else {
// return default text.
$output = $text;
}
return $output;
}
/**
* Verifies that an email is valid.
*
* Does not grok i18n domains. Not RFC compliant.
*
* @since 0.71
*
* @param string $email Email address to verify.
* @param boolean $check_dns Whether to check the DNS for the domain using checkdnsrr().
* @return string|bool Either false or the valid email address.
*/
function is_email( $email, $check_dns = false ) {
// Test for the minimum length the email can be
if ( strlen( $email ) < 3 ) {
return apply_filters( 'is_email', false, $email, 'email_too_short' );
}
// Test for an @ character after the first position
if ( strpos( $email, '@', 1 ) === false ) {
return apply_filters( 'is_email', false, $email, 'email_no_at' );
}
// Split out the local and domain parts
list( $local, $domain ) = explode( '@', $email, 2 );
// LOCAL PART
// Test for invalid characters
if ( !preg_match( '/^[a-zA-Z0-9!#$%&\'*+\/=?^_`{|}~\.-]+$/', $local ) ) {
return apply_filters( 'is_email', false, $email, 'local_invalid_chars' );
}
// DOMAIN PART
// Test for sequences of periods
if ( preg_match( '/\.{2,}/', $domain ) ) {
return apply_filters( 'is_email', false, $email, 'domain_period_sequence' );
}
// Test for leading and trailing periods and whitespace
if ( trim( $domain, " \t\n\r\0\x0B." ) !== $domain ) {
return apply_filters( 'is_email', false, $email, 'domain_period_limits' );
}
// Split the domain into subs
$subs = explode( '.', $domain );
// Assume the domain will have at least two subs
if ( 2 > count( $subs ) ) {
return apply_filters( 'is_email', false, $email, 'domain_no_periods' );
}
// Loop through each sub
foreach ( $subs as $sub ) {
// Test for leading and trailing hyphens and whitespace
if ( trim( $sub, " \t\n\r\0\x0B-" ) !== $sub ) {
return apply_filters( 'is_email', false, $email, 'sub_hyphen_limits' );
}
// Test for invalid characters
if ( !preg_match('/^[a-z0-9-]+$/i', $sub ) ) {
return apply_filters( 'is_email', false, $email, 'sub_invalid_chars' );
}
}
// DNS
// Check the domain has a valid MX and A resource record
if ( $check_dns && function_exists( 'checkdnsrr' ) && !( checkdnsrr( $domain . '.', 'MX' ) || checkdnsrr( $domain . '.', 'A' ) ) ) {
return apply_filters( 'is_email', false, $email, 'dns_no_rr' );
}
// Congratulations your email made it!
return apply_filters( 'is_email', $email, $email, null );
}
/**
* Convert to ASCII from email subjects.
*
* @since 1.2.0
* @usedby wp_mail() handles charsets in email subjects
*
* @param string $string Subject line
* @return string Converted string to ASCII
*/
function wp_iso_descrambler($string) {
/* this may only work with iso-8859-1, I'm afraid */
if (!preg_match('#\=\?(.+)\?Q\?(.+)\?\=#i', $string, $matches)) {
return $string;
} else {
$subject = str_replace('_', ' ', $matches[2]);
$subject = preg_replace_callback('#\=([0-9a-f]{2})#i', create_function('$match', 'return chr(hexdec(strtolower($match[1])));'), $subject);
return $subject;
}
}
/**
* Returns a date in the GMT equivalent.
*
* Requires and returns a date in the Y-m-d H:i:s format. Simply subtracts the
* value of the 'gmt_offset' option. Return format can be overridden using the
* $format parameter
*
* @since 1.2.0
*
* @uses get_option() to retrieve the the value of 'gmt_offset'.
* @param string $string The date to be converted.
* @param string $format The format string for the returned date (default is Y-m-d H:i:s)
* @return string GMT version of the date provided.
*/
function get_gmt_from_date($string, $format = 'Y-m-d H:i:s') {
preg_match('#([0-9]{1,4})-([0-9]{1,2})-([0-9]{1,2}) ([0-9]{1,2}):([0-9]{1,2}):([0-9]{1,2})#', $string, $matches);
$string_time = gmmktime($matches[4], $matches[5], $matches[6], $matches[2], $matches[3], $matches[1]);
$string_gmt = gmdate($format, $string_time - get_option('gmt_offset') * 3600);
return $string_gmt;
}
/**
* Converts a GMT date into the correct format for the blog.
*
* Requires and returns in the Y-m-d H:i:s format. Simply adds the value of
* gmt_offset.Return format can be overridden using the $format parameter
*
* @since 1.2.0
*
* @param string $string The date to be converted.
* @param string $format The format string for the returned date (default is Y-m-d H:i:s)
* @return string Formatted date relative to the GMT offset.
*/
function get_date_from_gmt($string, $format = 'Y-m-d H:i:s') {
preg_match('#([0-9]{1,4})-([0-9]{1,2})-([0-9]{1,2}) ([0-9]{1,2}):([0-9]{1,2}):([0-9]{1,2})#', $string, $matches);
$string_time = gmmktime($matches[4], $matches[5], $matches[6], $matches[2], $matches[3], $matches[1]);
$string_localtime = gmdate($format, $string_time + get_option('gmt_offset')*3600);
return $string_localtime;
}
/**
* Computes an offset in seconds from an iso8601 timezone.
*
* @since 1.5.0
*
* @param string $timezone Either 'Z' for 0 offset or '±hhmm'.
* @return int|float The offset in seconds.
*/
function iso8601_timezone_to_offset($timezone) {
// $timezone is either 'Z' or '[+|-]hhmm'
if ($timezone == 'Z') {
$offset = 0;
} else {
$sign = (substr($timezone, 0, 1) == '+') ? 1 : -1;
$hours = intval(substr($timezone, 1, 2));
$minutes = intval(substr($timezone, 3, 4)) / 60;
$offset = $sign * 3600 * ($hours + $minutes);
}
return $offset;
}
/**
* Converts an iso8601 date to MySQL DateTime format used by post_date[_gmt].
*
* @since 1.5.0
*
* @param string $date_string Date and time in ISO 8601 format {@link http://en.wikipedia.org/wiki/ISO_8601}.
* @param string $timezone Optional. If set to GMT returns the time minus gmt_offset. Default is 'user'.
* @return string The date and time in MySQL DateTime format - Y-m-d H:i:s.
*/
function iso8601_to_datetime($date_string, $timezone = 'user') {
$timezone = strtolower($timezone);
if ($timezone == 'gmt') {
preg_match('#([0-9]{4})([0-9]{2})([0-9]{2})T([0-9]{2}):([0-9]{2}):([0-9]{2})(Z|[\+|\-][0-9]{2,4}){0,1}#', $date_string, $date_bits);
if (!empty($date_bits[7])) { // we have a timezone, so let's compute an offset
$offset = iso8601_timezone_to_offset($date_bits[7]);
} else { // we don't have a timezone, so we assume user local timezone (not server's!)
$offset = 3600 * get_option('gmt_offset');
}
$timestamp = gmmktime($date_bits[4], $date_bits[5], $date_bits[6], $date_bits[2], $date_bits[3], $date_bits[1]);
$timestamp -= $offset;
return gmdate('Y-m-d H:i:s', $timestamp);
} else if ($timezone == 'user') {
return preg_replace('#([0-9]{4})([0-9]{2})([0-9]{2})T([0-9]{2}):([0-9]{2}):([0-9]{2})(Z|[\+|\-][0-9]{2,4}){0,1}#', '$1-$2-$3 $4:$5:$6', $date_string);
}
}
/**
* Adds a element attributes to open links in new windows.
*
* Comment text in popup windows should be filtered through this. Right now it's
* a moderately dumb function, ideally it would detect whether a target or rel
* attribute was already there and adjust its actions accordingly.
*
* @since 0.71
*
* @param string $text Content to replace links to open in a new window.
* @return string Content that has filtered links.
*/
function popuplinks($text) {
$text = preg_replace('/<a (.+?)>/i', "<a $1 target='_blank' rel='external'>", $text);
return $text;
}
/**
* Strips out all characters that are not allowable in an email.
*
* @since 1.5.0
*
* @param string $email Email address to filter.
* @return string Filtered email address.
*/
function sanitize_email( $email ) {
// Test for the minimum length the email can be
if ( strlen( $email ) < 3 ) {
return apply_filters( 'sanitize_email', '', $email, 'email_too_short' );
}
// Test for an @ character after the first position
if ( strpos( $email, '@', 1 ) === false ) {
return apply_filters( 'sanitize_email', '', $email, 'email_no_at' );
}
// Split out the local and domain parts
list( $local, $domain ) = explode( '@', $email, 2 );
// LOCAL PART
// Test for invalid characters
$local = preg_replace( '/[^a-zA-Z0-9!#$%&\'*+\/=?^_`{|}~\.-]/', '', $local );
if ( '' === $local ) {
return apply_filters( 'sanitize_email', '', $email, 'local_invalid_chars' );
}
// DOMAIN PART
// Test for sequences of periods
$domain = preg_replace( '/\.{2,}/', '', $domain );
if ( '' === $domain ) {
return apply_filters( 'sanitize_email', '', $email, 'domain_period_sequence' );
}
// Test for leading and trailing periods and whitespace
$domain = trim( $domain, " \t\n\r\0\x0B." );
if ( '' === $domain ) {
return apply_filters( 'sanitize_email', '', $email, 'domain_period_limits' );
}
// Split the domain into subs
$subs = explode( '.', $domain );
// Assume the domain will have at least two subs
if ( 2 > count( $subs ) ) {
return apply_filters( 'sanitize_email', '', $email, 'domain_no_periods' );
}
// Create an array that will contain valid subs
$new_subs = array();
// Loop through each sub
foreach ( $subs as $sub ) {
// Test for leading and trailing hyphens
$sub = trim( $sub, " \t\n\r\0\x0B-" );
// Test for invalid characters
$sub = preg_replace( '/^[^a-z0-9-]+$/i', '', $sub );
// If there's anything left, add it to the valid subs
if ( '' !== $sub ) {
$new_subs[] = $sub;
}
}
// If there aren't 2 or more valid subs
if ( 2 > count( $new_subs ) ) {
return apply_filters( 'sanitize_email', '', $email, 'domain_no_valid_subs' );
}
// Join valid subs into the new domain
$domain = join( '.', $new_subs );
// Put the email back together
$email = $local . '@' . $domain;
// Congratulations your email made it!
return apply_filters( 'sanitize_email', $email, $email, null );
}
/**
* Determines the difference between two timestamps.
*
* The difference is returned in a human readable format such as "1 hour",
* "5 mins", "2 days".
*
* @since 1.5.0
*
* @param int $from Unix timestamp from which the difference begins.
* @param int $to Optional. Unix timestamp to end the time difference. Default becomes time() if not set.
* @return string Human readable time difference.
*/
function human_time_diff( $from, $to = '' ) {
if ( empty($to) )
$to = time();
$diff = (int) abs($to - $from);
if ($diff <= 3600) {
$mins = round($diff / 60);
if ($mins <= 1) {
$mins = 1;
}
$since = sprintf(_n('%s min', '%s mins', $mins), $mins);
} else if (($diff <= 86400) && ($diff > 3600)) {
$hours = round($diff / 3600);
if ($hours <= 1) {
$hours = 1;
}
$since = sprintf(_n('%s hour', '%s hours', $hours), $hours);
} elseif ($diff >= 86400) {
$days = round($diff / 86400);
if ($days <= 1) {
$days = 1;
}
$since = sprintf(_n('%s day', '%s days', $days), $days);
}
return $since;
}
/**
* Generates an excerpt from the content, if needed.
*
* The excerpt word amount will be 55 words and if the amount is greater than
* that, then the string ' [...]' will be appended to the excerpt. If the string
* is less than 55 words, then the content will be returned as is.
*
* The 55 word limit can be modified by plugins/themes using the excerpt_length filter
* The ' [...]' string can be modified by plugins/themes using the excerpt_more filter
*
* @since 1.5.0
*
* @param string $text The excerpt. If set to empty an excerpt is generated.
* @return string The excerpt.
*/
function wp_trim_excerpt($text) {
$raw_excerpt = $text;
if ( '' == $text ) {
$text = get_the_content('');
$text = strip_shortcodes( $text );
$text = apply_filters('the_content', $text);
$text = str_replace(']]>', ']]>', $text);
$text = strip_tags($text);
$excerpt_length = apply_filters('excerpt_length', 55);
$excerpt_more = apply_filters('excerpt_more', ' ' . '[...]');
$words = explode(' ', $text, $excerpt_length + 1);
if (count($words) > $excerpt_length) {
array_pop($words);
$text = implode(' ', $words);
$text = $text . $excerpt_more;
}
}
return apply_filters('wp_trim_excerpt', $text, $raw_excerpt);
}
/**
* Converts named entities into numbered entities.
*
* @since 1.5.1
*
* @param string $text The text within which entities will be converted.
* @return string Text with converted entities.
*/
function ent2ncr($text) {
$to_ncr = array(
'"' => '"',
'&' => '&',
'⁄' => '/',
'<' => '<',
'>' => '>',
'|' => '|',
' ' => ' ',
'¡' => '¡',
'¢' => '¢',
'£' => '£',
'¤' => '¤',
'¥' => '¥',
'¦' => '¦',
'&brkbar;' => '¦',
'§' => '§',
'¨' => '¨',
'¨' => '¨',
'©' => '©',
'ª' => 'ª',
'«' => '«',
'¬' => '¬',
'­' => '­',
'®' => '®',
'¯' => '¯',
'&hibar;' => '¯',
'°' => '°',
'±' => '±',
'²' => '²',
'³' => '³',
'´' => '´',
'µ' => 'µ',
'¶' => '¶',
'·' => '·',
'¸' => '¸',
'¹' => '¹',
'º' => 'º',
'»' => '»',
'¼' => '¼',
'½' => '½',
'¾' => '¾',
'¿' => '¿',
'À' => 'À',
'Á' => 'Á',
'Â' => 'Â',
'Ã' => 'Ã',
'Ä' => 'Ä',
'Å' => 'Å',
'Æ' => 'Æ',
'Ç' => 'Ç',
'È' => 'È',
'É' => 'É',
'Ê' => 'Ê',
'Ë' => 'Ë',
'Ì' => 'Ì',
'Í' => 'Í',
'Î' => 'Î',
'Ï' => 'Ï',
'Ð' => 'Ð',
'Ñ' => 'Ñ',
'Ò' => 'Ò',
'Ó' => 'Ó',
'Ô' => 'Ô',
'Õ' => 'Õ',
'Ö' => 'Ö',
'×' => '×',
'Ø' => 'Ø',
'Ù' => 'Ù',
'Ú' => 'Ú',
'Û' => 'Û',
'Ü' => 'Ü',
'Ý' => 'Ý',
'Þ' => 'Þ',
'ß' => 'ß',
'à' => 'à',
'á' => 'á',
'â' => 'â',
'ã' => 'ã',
'ä' => 'ä',
'å' => 'å',
'æ' => 'æ',
'ç' => 'ç',
'è' => 'è',
'é' => 'é',
'ê' => 'ê',
'ë' => 'ë',
'ì' => 'ì',
'í' => 'í',
'î' => 'î',
'ï' => 'ï',
'ð' => 'ð',
'ñ' => 'ñ',
'ò' => 'ò',
'ó' => 'ó',
'ô' => 'ô',
'õ' => 'õ',
'ö' => 'ö',
'÷' => '÷',
'ø' => 'ø',
'ù' => 'ù',
'ú' => 'ú',
'û' => 'û',
'ü' => 'ü',
'ý' => 'ý',
'þ' => 'þ',
'ÿ' => 'ÿ',
'Œ' => 'Œ',
'œ' => 'œ',
'Š' => 'Š',
'š' => 'š',
'Ÿ' => 'Ÿ',
'ƒ' => 'ƒ',
'ˆ' => 'ˆ',
'˜' => '˜',
'Α' => 'Α',
'Β' => 'Β',
'Γ' => 'Γ',
'Δ' => 'Δ',
'Ε' => 'Ε',
'Ζ' => 'Ζ',
'Η' => 'Η',
'Θ' => 'Θ',
'Ι' => 'Ι',
'Κ' => 'Κ',
'Λ' => 'Λ',
'Μ' => 'Μ',
'Ν' => 'Ν',
'Ξ' => 'Ξ',
'Ο' => 'Ο',
'Π' => 'Π',
'Ρ' => 'Ρ',
'Σ' => 'Σ',
'Τ' => 'Τ',
'Υ' => 'Υ',
'Φ' => 'Φ',
'Χ' => 'Χ',
'Ψ' => 'Ψ',
'Ω' => 'Ω',
'α' => 'α',
'β' => 'β',
'γ' => 'γ',
'δ' => 'δ',
'ε' => 'ε',
'ζ' => 'ζ',
'η' => 'η',
'θ' => 'θ',
'ι' => 'ι',
'κ' => 'κ',
'λ' => 'λ',
'μ' => 'μ',
'ν' => 'ν',
'ξ' => 'ξ',
'ο' => 'ο',
'π' => 'π',
'ρ' => 'ρ',
'ς' => 'ς',
'σ' => 'σ',
'τ' => 'τ',
'υ' => 'υ',
'φ' => 'φ',
'χ' => 'χ',
'ψ' => 'ψ',
'ω' => 'ω',
'ϑ' => 'ϑ',
'ϒ' => 'ϒ',
'ϖ' => 'ϖ',
' ' => ' ',
' ' => ' ',
' ' => ' ',
'‌' => '‌',
'‍' => '‍',
'‎' => '‎',
'‏' => '‏',
'–' => '–',
'—' => '—',
'‘' => '‘',
'’' => '’',
'‚' => '‚',
'“' => '“',
'”' => '”',
'„' => '„',
'†' => '†',
'‡' => '‡',
'•' => '•',
'…' => '…',
'‰' => '‰',
'′' => '′',
'″' => '″',
'‹' => '‹',
'›' => '›',
'‾' => '‾',
'⁄' => '⁄',
'€' => '€',
'ℑ' => 'ℑ',
'℘' => '℘',
'ℜ' => 'ℜ',
'™' => '™',
'ℵ' => 'ℵ',
'↵' => '↵',
'⇐' => '⇐',
'⇑' => '⇑',
'⇒' => '⇒',
'⇓' => '⇓',
'⇔' => '⇔',
'∀' => '∀',
'∂' => '∂',
'∃' => '∃',
'∅' => '∅',
'∇' => '∇',
'∈' => '∈',
'∉' => '∉',
'∋' => '∋',
'∏' => '∏',
'∑' => '∑',
'−' => '−',
'∗' => '∗',
'√' => '√',
'∝' => '∝',
'∞' => '∞',
'∠' => '∠',
'∧' => '∧',
'∨' => '∨',
'∩' => '∩',
'∪' => '∪',
'∫' => '∫',
'∴' => '∴',
'∼' => '∼',
'≅' => '≅',
'≈' => '≈',
'≠' => '≠',
'≡' => '≡',
'≤' => '≤',
'≥' => '≥',
'⊂' => '⊂',
'⊃' => '⊃',
'⊄' => '⊄',
'⊆' => '⊆',
'⊇' => '⊇',
'⊕' => '⊕',
'⊗' => '⊗',
'⊥' => '⊥',
'⋅' => '⋅',
'⌈' => '⌈',
'⌉' => '⌉',
'⌊' => '⌊',
'⌋' => '⌋',
'⟨' => '〈',
'⟩' => '〉',
'←' => '←',
'↑' => '↑',
'→' => '→',
'↓' => '↓',
'↔' => '↔',
'◊' => '◊',
'♠' => '♠',
'♣' => '♣',
'♥' => '♥',
'♦' => '♦'
);
return str_replace( array_keys($to_ncr), array_values($to_ncr), $text );
}
/**
* Formats text for the rich text editor.
*
* The filter 'richedit_pre' is applied here. If $text is empty the filter will
* be applied to an empty string.
*
* @since 2.0.0
*
* @param string $text The text to be formatted.
* @return string The formatted text after filter is applied.
*/
function wp_richedit_pre($text) {
// Filtering a blank results in an annoying <br />\n
if ( empty($text) ) return apply_filters('richedit_pre', '');
$output = convert_chars($text);
$output = wpautop($output);
$output = htmlspecialchars($output, ENT_NOQUOTES);
return apply_filters('richedit_pre', $output);
}
/**
* Formats text for the HTML editor.
*
* Unless $output is empty it will pass through htmlspecialchars before the
* 'htmledit_pre' filter is applied.
*
* @since 2.5.0
*
* @param string $output The text to be formatted.
* @return string Formatted text after filter applied.
*/
function wp_htmledit_pre($output) {
if ( !empty($output) )
$output = htmlspecialchars($output, ENT_NOQUOTES); // convert only < > &
return apply_filters('htmledit_pre', $output);
}
/**
* Checks and cleans a URL.
*
* A number of characters are removed from the URL. If the URL is for displaying
* (the default behaviour) amperstands are also replaced. The 'esc_url' filter
* is applied to the returned cleaned URL.
*
* @since 1.2.0
* @uses wp_kses_bad_protocol() To only permit protocols in the URL set
* via $protocols or the common ones set in the function.
*
* @param string $url The URL to be cleaned.
* @param array $protocols Optional. An array of acceptable protocols.
* Defaults to 'http', 'https', 'ftp', 'ftps', 'mailto', 'news', 'irc', 'gopher', 'nntp', 'feed', 'telnet' if not set.
* @param string $context Optional. How the URL will be used. Default is 'display'.
* @return string The cleaned $url after the 'cleaned_url' filter is applied.
*/
function clean_url( $url, $protocols = null, $context = 'display' ) {
$original_url = $url;
if ('' == $url) return $url;
$url = preg_replace('|[^a-z0-9-~+_.?#=!&;,/:%@$\|*\'()\\x80-\\xff]|i', '', $url);
$strip = array('%0d', '%0a', '%0D', '%0A');
$url = _deep_replace($strip, $url);
$url = str_replace(';//', '://', $url);
/* If the URL doesn't appear to contain a scheme, we
* presume it needs http:// appended (unless a relative
* link starting with / or a php file).
*/
if ( strpos($url, ':') === false &&
substr( $url, 0, 1 ) != '/' && substr( $url, 0, 1 ) != '#' && !preg_match('/^[a-z0-9-]+?\.php/i', $url) )
$url = 'http://' . $url;
// Replace ampersands and single quotes only when displaying.
if ( 'display' == $context ) {
$url = preg_replace('/&([^#])(?![a-z]{2,8};)/', '&$1', $url);
$url = str_replace( "'", ''', $url );
}
if ( !is_array($protocols) )
$protocols = array('http', 'https', 'ftp', 'ftps', 'mailto', 'news', 'irc', 'gopher', 'nntp', 'feed', 'telnet');
if ( wp_kses_bad_protocol( $url, $protocols ) != $url )
return '';
return apply_filters('clean_url', $url, $original_url, $context);
}
/**
* Perform a deep string replace operation to ensure the values in $search are no longer present
*
* Repeats the replacement operation until it no longer replaces anything so as to remove "nested" values
* e.g. $subject = '%0%0%0DDD', $search ='%0D', $result ='' rather than the '%0%0DD' that
* str_replace would return
*
* @since 2.8.1
* @access private
*
* @param string|array $search
* @param string $subject
* @return string The processed string
*/
function _deep_replace($search, $subject){
$found = true;
while($found) {
$found = false;
foreach( (array) $search as $val ) {
while(strpos($subject, $val) !== false) {
$found = true;
$subject = str_replace($val, '', $subject);
}
}
}
return $subject;
}
/**
* Escapes data for use in a MySQL query
*
* This is just a handy shortcut for $wpdb->escape(), for completeness' sake
*
* @since 2.8.0
* @param string $sql Unescaped SQL data
* @return string The cleaned $sql
*/
function esc_sql( $sql ) {
global $wpdb;
return $wpdb->escape( $sql );
}
/**
* Checks and cleans a URL.
*
* A number of characters are removed from the URL. If the URL is for displaying
* (the default behaviour) amperstands are also replaced. The 'esc_url' filter
* is applied to the returned cleaned URL.
*
* @since 2.8.0
* @uses esc_url()
* @uses wp_kses_bad_protocol() To only permit protocols in the URL set
* via $protocols or the common ones set in the function.
*
* @param string $url The URL to be cleaned.
* @param array $protocols Optional. An array of acceptable protocols.
* Defaults to 'http', 'https', 'ftp', 'ftps', 'mailto', 'news', 'irc', 'gopher', 'nntp', 'feed', 'telnet' if not set.
* @return string The cleaned $url after the 'cleaned_url' filter is applied.
*/
function esc_url( $url, $protocols = null ) {
return clean_url( $url, $protocols, 'display' );
}
/**
* Performs esc_url() for database usage.
*
* @see esc_url()
* @see esc_url()
*
* @since 2.8.0
*
* @param string $url The URL to be cleaned.
* @param array $protocols An array of acceptable protocols.
* @return string The cleaned URL.
*/
function esc_url_raw( $url, $protocols = null ) {
return clean_url( $url, $protocols, 'db' );
}
/**
* Performs esc_url() for database or redirect usage.
*
* @see esc_url()
* @deprecated 2.8.0
*
* @since 2.3.1
*
* @param string $url The URL to be cleaned.
* @param array $protocols An array of acceptable protocols.
* @return string The cleaned URL.
*/
function sanitize_url( $url, $protocols = null ) {
return clean_url( $url, $protocols, 'db' );
}
/**
* Convert entities, while preserving already-encoded entities.
*
* @link http://www.php.net/htmlentities Borrowed from the PHP Manual user notes.
*
* @since 1.2.2
*
* @param string $myHTML The text to be converted.
* @return string Converted text.
*/
function htmlentities2($myHTML) {
$translation_table = get_html_translation_table( HTML_ENTITIES, ENT_QUOTES );
$translation_table[chr(38)] = '&';
return preg_replace( "/&(?![A-Za-z]{0,4}\w{2,3};|#[0-9]{2,3};)/", "&", strtr($myHTML, $translation_table) );
}
/**
* Escape single quotes, htmlspecialchar " < > &, and fix line endings.
*
* Escapes text strings for echoing in JS, both inline (for example in onclick="...")
* and inside <script> tag. Note that the strings have to be in single quotes.
* The filter 'js_escape' is also applied here.
*
* @since 2.8.0
*
* @param string $text The text to be escaped.
* @return string Escaped text.
*/
function esc_js( $text ) {
$safe_text = wp_check_invalid_utf8( $text );
$safe_text = _wp_specialchars( $safe_text, ENT_COMPAT );
$safe_text = preg_replace( '/&#(x)?0*(?(1)27|39);?/i', "'", stripslashes( $safe_text ) );
$safe_text = str_replace( "\r", '', $safe_text );
$safe_text = str_replace( "\n", '\\n', addslashes( $safe_text ) );
return apply_filters( 'js_escape', $safe_text, $text );
}
/**
* Escape single quotes, specialchar double quotes, and fix line endings.
*
* The filter 'js_escape' is also applied by esc_js()
*
* @since 2.0.4
*
* @deprecated 2.8.0
* @see esc_js()
*
* @param string $text The text to be escaped.
* @return string Escaped text.
*/
function js_escape( $text ) {
return esc_js( $text );
}
/**
* Escaping for HTML blocks.
*
* @since 2.8.0
*
* @param string $text
* @return string
*/
function esc_html( $text ) {
$safe_text = wp_check_invalid_utf8( $text );
$safe_text = _wp_specialchars( $safe_text, ENT_QUOTES );
return apply_filters( 'esc_html', $safe_text, $text );
}
/**
* Escaping for HTML blocks
* @deprecated 2.8.0
* @see esc_html()
*/
function wp_specialchars( $string, $quote_style = ENT_NOQUOTES, $charset = false, $double_encode = false ) {
if ( func_num_args() > 1 ) { // Maintain backwards compat for people passing additional args
$args = func_get_args();
return call_user_func_array( '_wp_specialchars', $args );
} else {
return esc_html( $string );
}
}
/**
* Escaping for HTML attributes.
*
* @since 2.8.0
*
* @param string $text
* @return string
*/
function esc_attr( $text ) {
$safe_text = wp_check_invalid_utf8( $text );
$safe_text = _wp_specialchars( $safe_text, ENT_QUOTES );
return apply_filters( 'attribute_escape', $safe_text, $text );
}
/**
* Escaping for HTML attributes.
*
* @since 2.0.6
*
* @deprecated 2.8.0
* @see esc_attr()
*
* @param string $text
* @return string
*/
function attribute_escape( $text ) {
return esc_attr( $text );
}
/**
* Escape a HTML tag name.
*
* @since 2.5.0
*
* @param string $tag_name
* @return string
*/
function tag_escape($tag_name) {
$safe_tag = strtolower( preg_replace('/[^a-zA-Z_:]/', '', $tag_name) );
return apply_filters('tag_escape', $safe_tag, $tag_name);
}
/**
* Escapes text for SQL LIKE special characters % and _.
*
* @since 2.5.0
*
* @param string $text The text to be escaped.
* @return string text, safe for inclusion in LIKE query.
*/
function like_escape($text) {
return str_replace(array("%", "_"), array("\\%", "\\_"), $text);
}
/**
* Convert full URL paths to absolute paths.
*
* Removes the http or https protocols and the domain. Keeps the path '/' at the
* beginning, so it isn't a true relative link, but from the web root base.
*
* @since 2.1.0
*
* @param string $link Full URL path.
* @return string Absolute path.
*/
function wp_make_link_relative( $link ) {
return preg_replace( '|https?://[^/]+(/.*)|i', '$1', $link );
}
/**
* Sanitises various option values based on the nature of the option.
*
* This is basically a switch statement which will pass $value through a number
* of functions depending on the $option.
*
* @since 2.0.5
*
* @param string $option The name of the option.
* @param string $value The unsanitised value.
* @return string Sanitized value.
*/
function sanitize_option($option, $value) {
switch ($option) {
case 'admin_email':
$value = sanitize_email($value);
break;
case 'thumbnail_size_w':
case 'thumbnail_size_h':
case 'medium_size_w':
case 'medium_size_h':
case 'large_size_w':
case 'large_size_h':
case 'embed_size_h':
case 'default_post_edit_rows':
case 'mailserver_port':
case 'comment_max_links':
case 'page_on_front':
case 'rss_excerpt_length':
case 'default_category':
case 'default_email_category':
case 'default_link_category':
case 'close_comments_days_old':
case 'comments_per_page':
case 'thread_comments_depth':
case 'users_can_register':
$value = absint( $value );
break;
case 'embed_size_w':
if ( '' !== $value )
$value = absint( $value );
break;
case 'posts_per_page':
case 'posts_per_rss':
$value = (int) $value;
if ( empty($value) ) $value = 1;
if ( $value < -1 ) $value = abs($value);
break;
case 'default_ping_status':
case 'default_comment_status':
// Options that if not there have 0 value but need to be something like "closed"
if ( $value == '0' || $value == '')
$value = 'closed';
break;
case 'blogdescription':
case 'blogname':
$value = addslashes($value);
$value = wp_filter_post_kses( $value ); // calls stripslashes then addslashes
$value = stripslashes($value);
$value = esc_html( $value );
break;
case 'blog_charset':
$value = preg_replace('/[^a-zA-Z0-9_-]/', '', $value); // strips slashes
break;
case 'date_format':
case 'time_format':
case 'mailserver_url':
case 'mailserver_login':
case 'mailserver_pass':
case 'ping_sites':
case 'upload_path':
$value = strip_tags($value);
$value = addslashes($value);
$value = wp_filter_kses($value); // calls stripslashes then addslashes
$value = stripslashes($value);
break;
case 'gmt_offset':
$value = preg_replace('/[^0-9:.-]/', '', $value); // strips slashes
break;
case 'siteurl':
case 'home':
$value = stripslashes($value);
$value = esc_url($value);
break;
default :
$value = apply_filters("sanitize_option_{$option}", $value, $option);
break;
}
return $value;
}
/**
* Parses a string into variables to be stored in an array.
*
* Uses {@link http://www.php.net/parse_str parse_str()} and stripslashes if
* {@link http://www.php.net/magic_quotes magic_quotes_gpc} is on.
*
* @since 2.2.1
* @uses apply_filters() for the 'wp_parse_str' filter.
*
* @param string $string The string to be parsed.
* @param array $array Variables will be stored in this array.
*/
function wp_parse_str( $string, &$array ) {
parse_str( $string, $array );
if ( get_magic_quotes_gpc() )
$array = stripslashes_deep( $array );
$array = apply_filters( 'wp_parse_str', $array );
}
/**
* Convert lone less than signs.
*
* KSES already converts lone greater than signs.
*
* @uses wp_pre_kses_less_than_callback in the callback function.
* @since 2.3.0
*
* @param string $text Text to be converted.
* @return string Converted text.
*/
function wp_pre_kses_less_than( $text ) {
return preg_replace_callback('%<[^>]*?((?=<)|>|$)%', 'wp_pre_kses_less_than_callback', $text);
}
/**
* Callback function used by preg_replace.
*
* @uses esc_html to format the $matches text.
* @since 2.3.0
*
* @param array $matches Populated by matches to preg_replace.
* @return string The text returned after esc_html if needed.
*/
function wp_pre_kses_less_than_callback( $matches ) {
if ( false === strpos($matches[0], '>') )
return esc_html($matches[0]);
return $matches[0];
}
/**
* WordPress implementation of PHP sprintf() with filters.
*
* @since 2.5.0
* @link http://www.php.net/sprintf
*
* @param string $pattern The string which formatted args are inserted.
* @param mixed $args,... Arguments to be formatted into the $pattern string.
* @return string The formatted string.
*/
function wp_sprintf( $pattern ) {
$args = func_get_args( );
$len = strlen($pattern);
$start = 0;
$result = '';
$arg_index = 0;
while ( $len > $start ) {
// Last character: append and break
if ( strlen($pattern) - 1 == $start ) {
$result .= substr($pattern, -1);
break;
}
// Literal %: append and continue
if ( substr($pattern, $start, 2) == '%%' ) {
$start += 2;
$result .= '%';
continue;
}
// Get fragment before next %
$end = strpos($pattern, '%', $start + 1);
if ( false === $end )
$end = $len;
$fragment = substr($pattern, $start, $end - $start);
// Fragment has a specifier
if ( $pattern{$start} == '%' ) {
// Find numbered arguments or take the next one in order
if ( preg_match('/^%(\d+)\$/', $fragment, $matches) ) {
$arg = isset($args[$matches[1]]) ? $args[$matches[1]] : '';
$fragment = str_replace("%{$matches[1]}$", '%', $fragment);
} else {
++$arg_index;
$arg = isset($args[$arg_index]) ? $args[$arg_index] : '';
}
// Apply filters OR sprintf
$_fragment = apply_filters( 'wp_sprintf', $fragment, $arg );
if ( $_fragment != $fragment )
$fragment = $_fragment;
else
$fragment = sprintf($fragment, strval($arg) );
}
// Append to result and move to next fragment
$result .= $fragment;
$start = $end;
}
return $result;
}
/**
* Localize list items before the rest of the content.
*
* The '%l' must be at the first characters can then contain the rest of the
* content. The list items will have ', ', ', and', and ' and ' added depending
* on the amount of list items in the $args parameter.
*
* @since 2.5.0
*
* @param string $pattern Content containing '%l' at the beginning.
* @param array $args List items to prepend to the content and replace '%l'.
* @return string Localized list items and rest of the content.
*/
function wp_sprintf_l($pattern, $args) {
// Not a match
if ( substr($pattern, 0, 2) != '%l' )
return $pattern;
// Nothing to work with
if ( empty($args) )
return '';
// Translate and filter the delimiter set (avoid ampersands and entities here)
$l = apply_filters('wp_sprintf_l', array(
/* translators: used between list items, there is a space after the coma */
'between' => __(', '),
/* translators: used between list items, there is a space after the and */
'between_last_two' => __(', and '),
/* translators: used between only two list items, there is a space after the and */
'between_only_two' => __(' and '),
));
$args = (array) $args;
$result = array_shift($args);
if ( count($args) == 1 )
$result .= $l['between_only_two'] . array_shift($args);
// Loop when more than two args
$i = count($args);
while ( $i ) {
$arg = array_shift($args);
$i--;
if ( 0 == $i )
$result .= $l['between_last_two'] . $arg;
else
$result .= $l['between'] . $arg;
}
return $result . substr($pattern, 2);
}
/**
* Safely extracts not more than the first $count characters from html string.
*
* UTF-8, tags and entities safe prefix extraction. Entities inside will *NOT*
* be counted as one character. For example & will be counted as 4, < as
* 3, etc.
*
* @since 2.5.0
*
* @param integer $str String to get the excerpt from.
* @param integer $count Maximum number of characters to take.
* @return string The excerpt.
*/
function wp_html_excerpt( $str, $count ) {
$str = wp_strip_all_tags( $str, true );
$str = mb_substr( $str, 0, $count );
// remove part of an entity at the end
$str = preg_replace( '/&[^;\s]{0,6}$/', '', $str );
return $str;
}
/**
* Add a Base url to relative links in passed content.
*
* By default it supports the 'src' and 'href' attributes. However this can be
* changed via the 3rd param.
*
* @since 2.7.0
*
* @param string $content String to search for links in.
* @param string $base The base URL to prefix to links.
* @param array $attrs The attributes which should be processed.
* @return string The processed content.
*/
function links_add_base_url( $content, $base, $attrs = array('src', 'href') ) {
$attrs = implode('|', (array)$attrs);
return preg_replace_callback("!($attrs)=(['\"])(.+?)\\2!i",
create_function('$m', 'return _links_add_base($m, "' . $base . '");'),
$content);
}
/**
* Callback to add a base url to relative links in passed content.
*
* @since 2.7.0
* @access private
*
* @param string $m The matched link.
* @param string $base The base URL to prefix to links.
* @return string The processed link.
*/
function _links_add_base($m, $base) {
//1 = attribute name 2 = quotation mark 3 = URL
return $m[1] . '=' . $m[2] .
(strpos($m[3], 'http://') === false ?
path_join($base, $m[3]) :
$m[3])
. $m[2];
}
/**
* Adds a Target attribute to all links in passed content.
*
* This function by default only applies to <a> tags, however this can be
* modified by the 3rd param.
*
* <b>NOTE:</b> Any current target attributed will be striped and replaced.
*
* @since 2.7.0
*
* @param string $content String to search for links in.
* @param string $target The Target to add to the links.
* @param array $tags An array of tags to apply to.
* @return string The processed content.
*/
function links_add_target( $content, $target = '_blank', $tags = array('a') ) {
$tags = implode('|', (array)$tags);
return preg_replace_callback("!<($tags)(.+?)>!i",
create_function('$m', 'return _links_add_target($m, "' . $target . '");'),
$content);
}
/**
* Callback to add a target attribute to all links in passed content.
*
* @since 2.7.0
* @access private
*
* @param string $m The matched link.
* @param string $target The Target to add to the links.
* @return string The processed link.
*/
function _links_add_target( $m, $target ) {
$tag = $m[1];
$link = preg_replace('|(target=[\'"](.*?)[\'"])|i', '', $m[2]);
return '<' . $tag . $link . ' target="' . $target . '">';
}
// normalize EOL characters and strip duplicate whitespace
function normalize_whitespace( $str ) {
$str = trim($str);
$str = str_replace("\r", "\n", $str);
$str = preg_replace( array( '/\n+/', '/[ \t]+/' ), array( "\n", ' ' ), $str );
return $str;
}
/**
* Properly strip all HTML tags including script and style
*
* @since 2.9.0
*
* @param string $string String containing HTML tags
* @param bool $remove_breaks optional Whether to remove left over line breaks and white space chars
* @return string The processed string.
*/
function wp_strip_all_tags($string, $remove_breaks = false) {
$string = preg_replace( '@<(script|style)[^>]*?>.*?</\\1>@si', '', $string );
$string = strip_tags($string);
if ( $remove_breaks )
$string = preg_replace('/[\r\n\t ]+/', ' ', $string);
return trim($string);
}
/**
* Sanitize a string from user input or from the db
*
* check for invalid UTF-8,
* Convert single < characters to entity,
* strip all tags,
* remove line breaks, tabs and extra whitre space,
* strip octets.
*
* @since 2.9
*
* @param string $str
* @return string
*/
function sanitize_text_field($str) {
$filtered = wp_check_invalid_utf8( $str );
if ( strpos($filtered, '<') !== false ) {
$filtered = wp_pre_kses_less_than( $filtered );
$filtered = wp_strip_all_tags( $filtered, true );
} else {
$filtered = trim( preg_replace('/[\r\n\t ]+/', ' ', $filtered) );
}
$match = array();
while ( preg_match('/%[a-f0-9]{2}/i', $filtered, $match) )
$filtered = str_replace($match[0], '', $filtered);
return apply_filters('sanitize_text_field', $filtered, $str);
}
?>