3v4l.org

run code in 500+ PHP versions simultaneously
<?php $a = [[11, 12, 13], [21, 22, 23], [31, 32, 33]]; list($a, $a) = $a; var_dump($a);
Output for 5.5.24 - 5.5.38, 5.6.0 - 5.6.28
int(21)
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.34, 8.3.0 - 8.3.33, 8.4.1 - 8.4.26, 8.5.0 - 8.5.9
array(3) { [0]=> int(21) [1]=> int(22) [2]=> int(23) }
preferences:
35.75 ms | 1139 KiB | 10 Q