3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = $a ? $a == null : 1;
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Warning: Undefined variable $a in /in/AQjbJ on line 2
Output for 7.1.10 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33
Notice: Undefined variable: a in /in/AQjbJ on line 2
Output for 7.3.32 - 7.3.33, 7.4.26
preferences:
172.61 ms | 401 KiB | 186 Q