[PHP] Verifica di una stringa

[andr3a]

$data = "20/05/05";
if( preg_replace(
	"/^([0-9]{2})\/([0-9]{2})\/([0-9]{2})$/e",
	'checkdate((int)"\\2",(int)"\\1",(int)"\\3");',
	$data
) ) {
	echo 'OK';
}