3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = [1, 1, 2, 3, 5, 8, 13]; foreach ($array => &$value) { $value *= $value; } var_dump($array);
Output for 5.4.0 - 5.4.24
Parse error: syntax error, unexpected '=>' (T_DOUBLE_ARROW) in /in/9iuH7 on line 5
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected '[' in /in/9iuH7 on line 3
Process exited with code 255.
preferences:
182.9 ms | 1395 KiB | 61 Q