3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a; if ($a) { echo 111; } else { echo 000; }
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Warning: Undefined variable $a in /in/lEAcL on line 5 0
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined variable: a in /in/lEAcL on line 5 0
Output for 7.3.32 - 7.3.33
0

preferences:
183.93 ms | 401 KiB | 167 Q