3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x = []; $x[5] = 1; $x['5'] = 2; var_dump(gettype(key($x));
Output for 5.4.0 - 5.4.16
Parse error: syntax error, unexpected ';' in /in/576Qv on line 6
Process exited with code 255.
Output for 5.3.0 - 5.3.26
Parse error: syntax error, unexpected '[' in /in/576Qv on line 3
Process exited with code 255.
preferences:
187.25 ms | 1395 KiB | 51 Q