3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array (1, 2, 3); $b = array (4, 5, 6, 7, 8, "a" => 1); var_dump ($a + $b);
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(6) { [0]=> int(1) [1]=> int(2) [2]=> int(3) [3]=> int(7) [4]=> int(8) ["a"]=> int(1) }

preferences:
284.3 ms | 406 KiB | 427 Q