3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array(0, 1, 2); $ref = &$a[2]; // Element [2] is not int(2) but &int(2) var_dump($a); $ref = 99; var_dump($ref); var_dump($a); $b = $a; $b[2] = 1234; var_dump($a);
Output for 5.4.0 - 5.4.45, 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(3) { [0]=> int(0) [1]=> int(1) [2]=> &int(2) } int(99) array(3) { [0]=> int(0) [1]=> int(1) [2]=> &int(99) } array(3) { [0]=> int(0) [1]=> int(1) [2]=> &int(1234) }
preferences:
274.96 ms | 404 KiB | 376 Q