Checks if a string is ASCII.
Description
The negative regex is faster for non-ASCII strings, as it allows the search to finish as soon as it encounters a non-ASCII character.
Parameters
$input_stringstringrequired- String to check.
Source
*
* @param string $input_string String to check.
* @return bool True if ASCII, false if not.
*/
protected function check_ascii( $input_string ) {
if ( function_exists( 'mb_check_encoding' ) ) {
if ( mb_check_encoding( $input_string, 'ASCII' ) ) {
return true;
}
} elseif ( ! preg_match( '/[^\x00-\x7F]/', $input_string ) ) {
return true;
Changelog
| Version | Description |
|---|---|
| 4.2.0 | Introduced. |
User Contributed Notes
You must log in before being able to contribute a note or feedback.