3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = ['a'=>1]; unset($array['b']); print_r($array);
Output for 5.4.19, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
Array ( [a] => 1 )
Output for 4.4.9
Parse error: syntax error, unexpected '[' in /in/hPAto on line 2
Process exited with code 255.
preferences:
95.23 ms | 406 KiB | 5 Q