| public static normalizeReference ( string $string ) : string | ||
| $string | string | |
| Результат | string | |
public static function normalizeReference($string)
{
// Collapse internal whitespace to single space and remove
// leading/trailing whitespace
$string = preg_replace('/\\s+/', '', trim($string));
return mb_strtoupper($string, 'UTF-8');
}