3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array('a0','a1','a2'); $b = array('b0','b1','b2'); var_dump($a + $b); var_dump(array_merge($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 - 5.5.36, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 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]=> string(2) "a0" [1]=> string(2) "a1" [2]=> string(2) "a2" } array(6) { [0]=> string(2) "a0" [1]=> string(2) "a1" [2]=> string(2) "a2" [3]=> string(2) "b0" [4]=> string(2) "b1" [5]=> string(2) "b2" }

preferences:
254.75 ms | 406 KiB | 377 Q