Online PHP editor | refs for 7cfV0

<?php $a = '23bc'; $b = ''; $c = '123'; $d = null; echo ( !strlen($a) || ctype_digit($a) )? "Good to Go\n" : "Bad to Go\n"; echo ( !strlen($b) || ctype_digit($b) )? "Good to Go\n" : "Bad to Go\n"; echo ( !strlen($c) || ctype_digit($c) )? "Good to Go\n" : "Bad to Go\n"; echo ( !strlen($d) || ctype_digit($c) )? "Good to Go\n" : "Bad to Go\n";