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WordPress/wp-includes/formatting.php

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<?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>
* &#8217;cause today&#8217;s effort makes it worth tomorrow&#8217;s &#8220;holiday&#8221;&#8230;
* </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;
$next = true;
$has_pre_parent = false;
$output = '';
$curl = '';
$textarr = preg_split('/(<.*>|\[.*\])/Us', $text, -1, PREG_SPLIT_DELIM_CAPTURE);
$stop = count($textarr);
// 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("&#8217;tain&#8217;t","&#8217;twere","&#8217;twas","&#8217;tis","&#8217;twill","&#8217;til","&#8217;bout","&#8217;nuff","&#8217;round","&#8217;cause");
}
$static_characters = array_merge(array('---', ' -- ', '--', 'xn&#8211;', '...', '``', '\'s', '\'\'', ' (tm)'), $cockney);
$static_replacements = array_merge(array('&#8212;', ' &#8212; ', '&#8211;', 'xn--', '&#8230;', '&#8220;', '&#8217;s', '&#8221;', ' &#8482;'), $cockneyreplace);
$dynamic_characters = array('/\'(\d\d(?:&#8217;|\')?s)/', '/(\s|\A|")\'/', '/(\d+)"/', '/(\d+)\'/', '/(\S)\'([^\'\s])/', '/(\s|\A)"(?!\s)/', '/"(\s|\S|\Z)/', '/\'([\s.]|\Z)/', '/(\d+)x(\d+)/');
$dynamic_replacements = array('&#8217;$1','$1&#8216;', '$1&#8243;', '$1&#8242;', '$1&#8217;$2', '$1&#8220;$2', '&#8221;$1', '&#8217;$1', '$1&#215;$2');
for ( $i = 0; $i < $stop; $i++ ) {
$curl = $textarr[$i];
if ( !empty($curl) && '<' != $curl{0} && '[' != $curl{0} && $next && !$has_pre_parent) { // If it's not a tag
// static strings
$curl = str_replace($static_characters, $static_replacements, $curl);
// regular expressions
$curl = preg_replace($dynamic_characters, $dynamic_replacements, $curl);
} elseif (strpos($curl, '<code') !== false || strpos($curl, '<kbd') !== false || strpos($curl, '<style') !== false || strpos($curl, '<script') !== false) {
$next = false;
} elseif (strpos($curl, '<pre') !== false) {
$has_pre_parent = true;
} elseif (strpos($curl, '</pre>') !== false) {
$has_pre_parent = false;
} else {
$next = true;
}
$curl = preg_replace('/&([^#])(?![a-zA-Z1-4]{1,8};)/', '&#038;$1', $curl);
$output .= $curl;
}
return $output;
}
/**
* 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) {
$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|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)';
$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>([^<]+)\s*?(</(?:div|address|form)[^>]*>)!', "<p>$1</p>$2", $pee);
$pee = preg_replace( '|<p>|', "$1<p>", $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 );
$pee = preg_replace('/<p>\s*?(' . get_shortcode_regex() . ')\s*<\/p>/s', '$1', $pee); // don't auto-p wrap shortcodes that stand alone
return $pee;
}
/**
* Checks to see if a string is utf8 encoded.
*
* @author bmorel at ssi dot fr
*
* @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) { # by bmorel at ssi dot fr
$length = strlen($Str);
for ($i=0; $i < $length; $i++) {
if (ord($Str[$i]) < 0x80) continue; # 0bbbbbbb
elseif ((ord($Str[$i]) & 0xE0) == 0xC0) $n=1; # 110bbbbb
elseif ((ord($Str[$i]) & 0xF0) == 0xE0) $n=2; # 1110bbbb
elseif ((ord($Str[$i]) & 0xF8) == 0xF0) $n=3; # 11110bbb
elseif ((ord($Str[$i]) & 0xFC) == 0xF8) $n=4; # 111110bb
elseif ((ord($Str[$i]) & 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
* &quot;, 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?[0-9]+|[a-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( "'", '&#039;', $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( '&#039;' => '\'', '&#x27;' => '\'' );
$single_preg = array( '/&#0*39;/' => '&#039;', '/&#x0*27;/i' => '&#x27;' );
$double = array( '&quot;' => '"', '&#034;' => '"', '&#x22;' => '"' );
$double_preg = array( '/&#0*34;/' => '&#034;', '/&#x0*22;/i' => '&#x22;' );
$others = array( '&lt;' => '<', '&#060;' => '<', '&gt;' => '>', '&#062;' => '>', '&amp;' => '&', '&#038;' => '&', '&#x26;' => '&' );
$others_preg = array( '/&#0*60;/' => '&#060;', '/&#0*62;/' => '&#062;', '/&#0*38;/' => '&#038;', '/&#x0*26;/i' => '&#x26;' );
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;
}
/**
* Filters certain characters from the file name.
*
* Turns all strings to lowercase removing most characters except alphanumeric
* with spaces, dashes and periods. All spaces and underscores are converted to
* dashes. Multiple dashes are converted to a single dash. Finally, if the file
* name ends with a dash, it is removed.
*
* @since 2.1.0
*
* @param string $name The file name
* @return string Sanitized file name
*/
function sanitize_file_name( $name ) { // Like sanitize_title, but with periods
$name = strtolower( $name );
$name = preg_replace('/&.+?;/', '', $name); // kill entities
$name = str_replace( '_', '-', $name );
$name = preg_replace('/[^a-z0-9\s-.]/', '', $name);
$name = preg_replace('/\s+/', '-', $name);
$name = preg_replace('|-+|', '-', $name);
$name = trim($name, '-');
return $name;
}
/**
* 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;
$username = strip_tags($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 = '') {
$title = strip_tags($title);
$title = apply_filters('sanitize_title', $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 = 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;
}
/**
* 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(
'&#128;' => '&#8364;', // the Euro sign
'&#129;' => '',
'&#130;' => '&#8218;', // these are Windows CP1252 specific characters
'&#131;' => '&#402;', // they would look weird on non-Windows browsers
'&#132;' => '&#8222;',
'&#133;' => '&#8230;',
'&#134;' => '&#8224;',
'&#135;' => '&#8225;',
'&#136;' => '&#710;',
'&#137;' => '&#8240;',
'&#138;' => '&#352;',
'&#139;' => '&#8249;',
'&#140;' => '&#338;',
'&#141;' => '',
'&#142;' => '&#382;',
'&#143;' => '',
'&#144;' => '',
'&#145;' => '&#8216;',
'&#146;' => '&#8217;',
'&#147;' => '&#8220;',
'&#148;' => '&#8221;',
'&#149;' => '&#8226;',
'&#150;' => '&#8211;',
'&#151;' => '&#8212;',
'&#152;' => '&#732;',
'&#153;' => '&#8482;',
'&#154;' => '&#353;',
'&#155;' => '&#8250;',
'&#156;' => '&#339;',
'&#157;' => '',
'&#158;' => '',
'&#159;' => '&#376;'
);
// Remove metadata tags
$content = preg_replace('/<title>(.+?)<\/title>/','',$content);
$content = preg_replace('/<category>(.+?)<\/category>/','',$content);
// Converts lone & characters into &#38; (a.k.a. &amp;)
$content = preg_replace('/&([^#])(?![a-z1-4]{1,8};)/i', '&#038;$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;
}
/**
* 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;
/** @todo use preg_replace_callback() instead */
if ( $is_winIE || $is_macIE )
$text = preg_replace("/\%u([0-9A-F]{4,4})/e", "'&#'.base_convert('\\1',16,10).';'", $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})#', '&lt;$1', $text);
while (preg_match("/<(\/?\w*)\s*([^>]*)>/",$text,$regex)) {
$newtext .= $tagqueue;
$i = strpos($text,$regex[0]);
$l = strlen($regex[0]);
// clear the shifter
$tagqueue = '';
// Pop or Push
if ($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 $wpdb->escape($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);
}
}
$emailNOSPAMaddy = str_replace('@','&#64;',$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) {
$ret = '';
$url = $matches[2];
$url = clean_url($url);
if ( empty($url) )
return $matches[0];
// removed trailing [.,;:] from URL
if ( in_array(substr($url, -1), array('.', ',', ';', ':')) === true ) {
$ret = substr($url, -1);
$url = substr($url, 0, strlen($url)-1);
}
return $matches[1] . "<a href=\"$url\" rel=\"nofollow\">$url</a>" . $ret;
}
/**
* 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;
$dest = clean_url($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
$ret = preg_replace_callback('#([\s>])([\w]+?://[\w\\x80-\\xff\#$%&~/.\-;:=,?@\[\]+]*)#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 = $wpdb->escape($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];
$smiley_masked = attribute_escape($smiley);
return " <img src='$siteurl/wp-includes/images/smilies/$img' 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;
}
/**
* Checks to see if the text is a valid email address.
*
* @since 0.71
*
* @param string $user_email The email address to be checked.
* @return bool Returns true if valid, otherwise false.
*/
function is_email($user_email) {
$chars = "/^([a-z0-9+_]|\\-|\\.)+@(([a-z0-9_]|\\-)+\\.)+[a-z]{2,6}\$/i";
if (strpos($user_email, '@') !== false && strpos($user_email, '.') !== false) {
if (preg_match($chars, $user_email)) {
return true;
} else {
return false;
}
} else {
return false;
}
}
/**
* 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.
*
* @since 1.2.0
*
* @uses get_option() to retrieve the the value of 'gmt_offset'.
* @param string $string The date to be converted.
* @return string GMT version of the date provided.
*/
function get_gmt_from_date($string) {
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('Y-m-d H:i:s', $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.
*
* @since 1.2.0
*
* @param string $string The date to be converted.
* @return string Formatted date relative to the GMT offset.
*/
function get_date_from_gmt($string) {
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('Y-m-d H:i:s', $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) {
return preg_replace('/[^a-z0-9+_.@-]/i', '', $email);
}
/**
* 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(__ngettext('%s min', '%s mins', $mins), $mins);
} else if (($diff <= 86400) && ($diff > 3600)) {
$hours = round($diff / 3600);
if ($hours <= 1) {
$hours = 1;
}
$since = sprintf(__ngettext('%s hour', '%s hours', $hours), $hours);
} elseif ($diff >= 86400) {
$days = round($diff / 86400);
if ($days <= 1) {
$days = 1;
}
$since = sprintf(__ngettext('%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.
*
* @since 1.5.0
*
* @param string $text The exerpt. If set to empty an excerpt is generated.
* @return string The excerpt.
*/
function wp_trim_excerpt($text) {
if ( '' == $text ) {
$text = get_the_content('');
$text = strip_shortcodes( $text );
$text = apply_filters('the_content', $text);
$text = str_replace(']]>', ']]&gt;', $text);
$text = strip_tags($text);
$excerpt_length = apply_filters('excerpt_length', 55);
$words = explode(' ', $text, $excerpt_length + 1);
if (count($words) > $excerpt_length) {
array_pop($words);
array_push($words, '[...]');
$text = implode(' ', $words);
}
}
return $text;
}
/**
* 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(
'&quot;' => '&#34;',
'&amp;' => '&#38;',
'&frasl;' => '&#47;',
'&lt;' => '&#60;',
'&gt;' => '&#62;',
'|' => '&#124;',
'&nbsp;' => '&#160;',
'&iexcl;' => '&#161;',
'&cent;' => '&#162;',
'&pound;' => '&#163;',
'&curren;' => '&#164;',
'&yen;' => '&#165;',
'&brvbar;' => '&#166;',
'&brkbar;' => '&#166;',
'&sect;' => '&#167;',
'&uml;' => '&#168;',
'&die;' => '&#168;',
'&copy;' => '&#169;',
'&ordf;' => '&#170;',
'&laquo;' => '&#171;',
'&not;' => '&#172;',
'&shy;' => '&#173;',
'&reg;' => '&#174;',
'&macr;' => '&#175;',
'&hibar;' => '&#175;',
'&deg;' => '&#176;',
'&plusmn;' => '&#177;',
'&sup2;' => '&#178;',
'&sup3;' => '&#179;',
'&acute;' => '&#180;',
'&micro;' => '&#181;',
'&para;' => '&#182;',
'&middot;' => '&#183;',
'&cedil;' => '&#184;',
'&sup1;' => '&#185;',
'&ordm;' => '&#186;',
'&raquo;' => '&#187;',
'&frac14;' => '&#188;',
'&frac12;' => '&#189;',
'&frac34;' => '&#190;',
'&iquest;' => '&#191;',
'&Agrave;' => '&#192;',
'&Aacute;' => '&#193;',
'&Acirc;' => '&#194;',
'&Atilde;' => '&#195;',
'&Auml;' => '&#196;',
'&Aring;' => '&#197;',
'&AElig;' => '&#198;',
'&Ccedil;' => '&#199;',
'&Egrave;' => '&#200;',
'&Eacute;' => '&#201;',
'&Ecirc;' => '&#202;',
'&Euml;' => '&#203;',
'&Igrave;' => '&#204;',
'&Iacute;' => '&#205;',
'&Icirc;' => '&#206;',
'&Iuml;' => '&#207;',
'&ETH;' => '&#208;',
'&Ntilde;' => '&#209;',
'&Ograve;' => '&#210;',
'&Oacute;' => '&#211;',
'&Ocirc;' => '&#212;',
'&Otilde;' => '&#213;',
'&Ouml;' => '&#214;',
'&times;' => '&#215;',
'&Oslash;' => '&#216;',
'&Ugrave;' => '&#217;',
'&Uacute;' => '&#218;',
'&Ucirc;' => '&#219;',
'&Uuml;' => '&#220;',
'&Yacute;' => '&#221;',
'&THORN;' => '&#222;',
'&szlig;' => '&#223;',
'&agrave;' => '&#224;',
'&aacute;' => '&#225;',
'&acirc;' => '&#226;',
'&atilde;' => '&#227;',
'&auml;' => '&#228;',
'&aring;' => '&#229;',
'&aelig;' => '&#230;',
'&ccedil;' => '&#231;',
'&egrave;' => '&#232;',
'&eacute;' => '&#233;',
'&ecirc;' => '&#234;',
'&euml;' => '&#235;',
'&igrave;' => '&#236;',
'&iacute;' => '&#237;',
'&icirc;' => '&#238;',
'&iuml;' => '&#239;',
'&eth;' => '&#240;',
'&ntilde;' => '&#241;',
'&ograve;' => '&#242;',
'&oacute;' => '&#243;',
'&ocirc;' => '&#244;',
'&otilde;' => '&#245;',
'&ouml;' => '&#246;',
'&divide;' => '&#247;',
'&oslash;' => '&#248;',
'&ugrave;' => '&#249;',
'&uacute;' => '&#250;',
'&ucirc;' => '&#251;',
'&uuml;' => '&#252;',
'&yacute;' => '&#253;',
'&thorn;' => '&#254;',
'&yuml;' => '&#255;',
'&OElig;' => '&#338;',
'&oelig;' => '&#339;',
'&Scaron;' => '&#352;',
'&scaron;' => '&#353;',
'&Yuml;' => '&#376;',
'&fnof;' => '&#402;',
'&circ;' => '&#710;',
'&tilde;' => '&#732;',
'&Alpha;' => '&#913;',
'&Beta;' => '&#914;',
'&Gamma;' => '&#915;',
'&Delta;' => '&#916;',
'&Epsilon;' => '&#917;',
'&Zeta;' => '&#918;',
'&Eta;' => '&#919;',
'&Theta;' => '&#920;',
'&Iota;' => '&#921;',
'&Kappa;' => '&#922;',
'&Lambda;' => '&#923;',
'&Mu;' => '&#924;',
'&Nu;' => '&#925;',
'&Xi;' => '&#926;',
'&Omicron;' => '&#927;',
'&Pi;' => '&#928;',
'&Rho;' => '&#929;',
'&Sigma;' => '&#931;',
'&Tau;' => '&#932;',
'&Upsilon;' => '&#933;',
'&Phi;' => '&#934;',
'&Chi;' => '&#935;',
'&Psi;' => '&#936;',
'&Omega;' => '&#937;',
'&alpha;' => '&#945;',
'&beta;' => '&#946;',
'&gamma;' => '&#947;',
'&delta;' => '&#948;',
'&epsilon;' => '&#949;',
'&zeta;' => '&#950;',
'&eta;' => '&#951;',
'&theta;' => '&#952;',
'&iota;' => '&#953;',
'&kappa;' => '&#954;',
'&lambda;' => '&#955;',
'&mu;' => '&#956;',
'&nu;' => '&#957;',
'&xi;' => '&#958;',
'&omicron;' => '&#959;',
'&pi;' => '&#960;',
'&rho;' => '&#961;',
'&sigmaf;' => '&#962;',
'&sigma;' => '&#963;',
'&tau;' => '&#964;',
'&upsilon;' => '&#965;',
'&phi;' => '&#966;',
'&chi;' => '&#967;',
'&psi;' => '&#968;',
'&omega;' => '&#969;',
'&thetasym;' => '&#977;',
'&upsih;' => '&#978;',
'&piv;' => '&#982;',
'&ensp;' => '&#8194;',
'&emsp;' => '&#8195;',
'&thinsp;' => '&#8201;',
'&zwnj;' => '&#8204;',
'&zwj;' => '&#8205;',
'&lrm;' => '&#8206;',
'&rlm;' => '&#8207;',
'&ndash;' => '&#8211;',
'&mdash;' => '&#8212;',
'&lsquo;' => '&#8216;',
'&rsquo;' => '&#8217;',
'&sbquo;' => '&#8218;',
'&ldquo;' => '&#8220;',
'&rdquo;' => '&#8221;',
'&bdquo;' => '&#8222;',
'&dagger;' => '&#8224;',
'&Dagger;' => '&#8225;',
'&bull;' => '&#8226;',
'&hellip;' => '&#8230;',
'&permil;' => '&#8240;',
'&prime;' => '&#8242;',
'&Prime;' => '&#8243;',
'&lsaquo;' => '&#8249;',
'&rsaquo;' => '&#8250;',
'&oline;' => '&#8254;',
'&frasl;' => '&#8260;',
'&euro;' => '&#8364;',
'&image;' => '&#8465;',
'&weierp;' => '&#8472;',
'&real;' => '&#8476;',
'&trade;' => '&#8482;',
'&alefsym;' => '&#8501;',
'&crarr;' => '&#8629;',
'&lArr;' => '&#8656;',
'&uArr;' => '&#8657;',
'&rArr;' => '&#8658;',
'&dArr;' => '&#8659;',
'&hArr;' => '&#8660;',
'&forall;' => '&#8704;',
'&part;' => '&#8706;',
'&exist;' => '&#8707;',
'&empty;' => '&#8709;',
'&nabla;' => '&#8711;',
'&isin;' => '&#8712;',
'&notin;' => '&#8713;',
'&ni;' => '&#8715;',
'&prod;' => '&#8719;',
'&sum;' => '&#8721;',
'&minus;' => '&#8722;',
'&lowast;' => '&#8727;',
'&radic;' => '&#8730;',
'&prop;' => '&#8733;',
'&infin;' => '&#8734;',
'&ang;' => '&#8736;',
'&and;' => '&#8743;',
'&or;' => '&#8744;',
'&cap;' => '&#8745;',
'&cup;' => '&#8746;',
'&int;' => '&#8747;',
'&there4;' => '&#8756;',
'&sim;' => '&#8764;',
'&cong;' => '&#8773;',
'&asymp;' => '&#8776;',
'&ne;' => '&#8800;',
'&equiv;' => '&#8801;',
'&le;' => '&#8804;',
'&ge;' => '&#8805;',
'&sub;' => '&#8834;',
'&sup;' => '&#8835;',
'&nsub;' => '&#8836;',
'&sube;' => '&#8838;',
'&supe;' => '&#8839;',
'&oplus;' => '&#8853;',
'&otimes;' => '&#8855;',
'&perp;' => '&#8869;',
'&sdot;' => '&#8901;',
'&lceil;' => '&#8968;',
'&rceil;' => '&#8969;',
'&lfloor;' => '&#8970;',
'&rfloor;' => '&#8971;',
'&lang;' => '&#9001;',
'&rang;' => '&#9002;',
'&larr;' => '&#8592;',
'&uarr;' => '&#8593;',
'&rarr;' => '&#8594;',
'&darr;' => '&#8595;',
'&harr;' => '&#8596;',
'&loz;' => '&#9674;',
'&spades;' => '&#9824;',
'&clubs;' => '&#9827;',
'&hearts;' => '&#9829;',
'&diams;' => '&#9830;'
);
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 'clean_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');
$url = str_replace($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 ) != '/' && !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};)/', '&#038;$1', $url);
$url = str_replace( "'", '&#039;', $url );
}
if ( !is_array($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);
}
/**
* Performs clean_url() for database usage.
*
* @see clean_url()
*
* @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 );
$translation_table[chr(38)] = '&';
return preg_replace( "/&(?![A-Za-z]{0,4}\w{2,3};|#[0-9]{2,3};)/", "&amp;", strtr($myHTML, $translation_table) );
}
/**
* Escape single quotes, specialchar double quotes, and fix line endings.
*
* The filter 'js_escape' is also applied here.
*
* @since 2.0.4
*
* @param string $text The text to be escaped.
* @return string Escaped text.
*/
function js_escape($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 = preg_replace( "/\r?\n/", "\\n", addslashes( $safe_text ) );
return apply_filters( 'js_escape', $safe_text, $text );
}
/**
* Escaping for HTML attributes.
*
* @since 2.0.6
*
* @param string $text
* @return string
*/
function attribute_escape( $text ) {
$safe_text = wp_check_invalid_utf8( $text );
$safe_text = wp_specialchars( $safe_text, ENT_QUOTES );
return apply_filters( 'attribute_escape', $safe_text, $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 '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':
$value = abs((int) $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 = wp_specialchars( $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);
$value = clean_url($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 wp_specialchars to format the $matches text.
* @since 2.3.0
*
* @param array $matches Populated by matches to preg_replace.
* @return string The text returned after wp_specialchars if needed.
*/
function wp_pre_kses_less_than_callback( $matches ) {
if ( false === strpos($matches[0], '>') )
return wp_specialchars($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(
'between' => _c(', |between list items'),
'between_last_two' => _c(', and |between last two list items'),
'between_only_two' => _c(' and |between only two list items'),
));
$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 ( $i == 1 )
$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 &amp; will be counted as 4, &lt; 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 = strip_tags( $str );
$str = mb_strcut( $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;
}
?>
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