3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = array("FFF" => '1',22,54,75,"boo" = '90',364); $keys = array_keys($array); Var_dump($keys);
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.7
Parse error: syntax error, unexpected '=', expecting ')' in /in/hQ6lR on line 3
Process exited with code 255.
preferences:
182.19 ms | 1395 KiB | 36 Q