Converts a number of special characters into their HTML entities.
Description
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.
Parameters
$textstringrequired- The text which is to be encoded.
$quote_styleint|stringoptional- Converts double quotes if set to ENT_COMPAT, both single and double if set to ENT_QUOTES or none if set to ENT_NOQUOTES.
Converts single and double quotes, as well as converting HTML named entities (that are not also XML named entities) to their code points if set to ENT_XML1. 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.Default:
ENT_NOQUOTES $charsetfalse|stringoptional- The character encoding of the string.
Default:
false $double_encodebooloptional- Whether to encode existing HTML entities.
Default:
false
Source
function _wp_specialchars( $text, $quote_style = ENT_NOQUOTES, $charset = false, $double_encode = false ) {
$text = (string) $text;
if ( 0 === strlen( $text ) ) {
return '';
}
// Don't bother if there are no specialchars - saves some processing.
if ( ! preg_match( '/[&<>"\']/', $text ) ) {
return $text;
}
// Account for the previous behavior of the function when the $quote_style is not an accepted value.
if ( empty( $quote_style ) ) {
$quote_style = ENT_NOQUOTES;
} elseif ( ENT_XML1 === $quote_style ) {
$quote_style = ENT_QUOTES | ENT_XML1;
} elseif ( ! in_array( $quote_style, array( ENT_NOQUOTES, ENT_COMPAT, ENT_QUOTES, '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 = null;
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' ), true ) ) {
$charset = 'UTF-8';
}
$_quote_style = $quote_style;
if ( 'double' === $quote_style ) {
$quote_style = ENT_COMPAT;
$_quote_style = ENT_COMPAT;
} elseif ( 'single' === $quote_style ) {
$quote_style = ENT_NOQUOTES;
}
if ( ! $double_encode ) {
/*
* Guarantee every &entity; is valid, convert &garbage; into &garbage;
* This is required for PHP < 5.4.0 because ENT_HTML401 flag is unavailable.
*/
$text = wp_kses_normalize_entities( $text, ( $quote_style & ENT_XML1 ) ? 'xml' : 'html' );
}
$text = htmlspecialchars( $text, $quote_style, $charset, $double_encode );
// Back-compat.
if ( 'single' === $_quote_style ) {
$text = str_replace( "'", ''', $text );
}
return $text;
}
Escape JSON for use on HTML or attribute text nodes.