wp_specialchars_decode

Source code

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( '/&#0*39;/'  => ''', '/&#x0*27;/i' => ''' );

	$double = array( '"' => '"', '"'  => '"', '"' => '"' );

	$double_preg = array( '/&#0*34;/'  => '"', '/&#x0*22;/i' => '"' );

	$others = array( '&lt;'   => '<', '<'  => '<', '&gt;'   => '>', '>'  => '>', '&amp;'  => '&', '&'  => '&', '&' => '&' );

	$others_preg = array( '/&#0*60;/'  => '<', '/&#0*62;/'  => '>', '/&#0*38;/'  => '&', '/&#x0*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 );

}