3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = "1234567890a"; var_dump($a["010"], isset($a["010"])); isset("10");// true
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.6
Fatal error: Cannot use isset() on the result of an expression (you can use "null !== expression" instead) in /in/O65JA on line 4
Process exited with code 255.
preferences:
176.67 ms | 1395 KiB | 35 Q