3v4l.org

run code in 300+ PHP versions simultaneously
<?php function getArray() { return [1, 2, 3]; } function squareArray(array &$a) { foreach ($a as &$v) { $v *= 2; } } // Generates a warning in PHP 7. $tempA = getArray(); print_r(squareArray((getArray())));
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
Notice: Only variables should be passed by reference in /in/0N2u5 on line 14
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.3.32 - 7.3.33
preferences:
154.15 ms | 402 KiB | 184 Q