3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array(TRUE => 'good', FALSE => 'bad'); print $a[true]; print $a[0];
Output for 4.3.2 - 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 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
goodbad
Output for 4.3.0 - 4.3.1
Notice: Undefined offset: 1 in /in/3OEt7 on line 4 Notice: Undefined offset: 0 in /in/3OEt7 on line 5

preferences:
222.52 ms | 401 KiB | 358 Q