3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array(7=>1, 2, 3); $a[] = 4; $a[2] = 5; var_dump($a); array_push($a, 6); var_dump($a);
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 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 - 8.2.19, 8.3.0 - 8.3.7
array(5) { [7]=> int(1) [8]=> int(2) [9]=> int(3) [10]=> int(4) [2]=> int(5) } array(6) { [7]=> int(1) [8]=> int(2) [9]=> int(3) [10]=> int(4) [2]=> int(5) [11]=> int(6) }

preferences:
270.61 ms | 406 KiB | 424 Q