Requests_IDNAEncoder::is_ascii( string $string )
Check whether a given string contains only ASCII characters
Parameters
- $string
-
(string) (Required)
Return
(bool) Is the string ASCII-only?
Source
File: wp-includes/Requests/IDNAEncoder.php
protected static function is_ascii($string) {
return (preg_match('/(?:[^\x00-\x7F])/', $string) !== 1);
}