Online PHP editor | output for 7cfV0

@ 2014-12-07T01:04:03Z

<?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";

Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7: Bad to Go Good to Go Good to Go Deprecated: strlen(): Passing null to parameter #1 ($string) of type string is deprecated in /in/7cfV0 on line 10 Good to Go
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30: Bad to Go Good to Go Good to Go Good to Go

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