3v4l.org

run code in 300+ PHP versions simultaneously
<?php $input = array("php", 4.0, array("green", "red")); $input2 = $input; // add ref count $ar = &$input2[0]; print_r($input2); $ar = 100; print_r($input2); /* $reversed = array_reverse($input); $preserved = array_reverse($input, true); print_r($input); print_r($reversed); print_r($preserved); */
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Array ( [0] => php [1] => 4 [2] => Array ( [0] => green [1] => red ) ) Array ( [0] => 100 [1] => 4 [2] => Array ( [0] => green [1] => red ) )
preferences:
204 ms | 404 KiB | 327 Q