3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array(1, 2, 5); $b = array(4); $c = array(9, 10, 18); $x = array_merge($a, $b, $c); var_dump($x);
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 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 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(7) { [0]=> int(1) [1]=> int(2) [2]=> int(5) [3]=> int(4) [4]=> int(9) [5]=> int(10) [6]=> int(18) }

preferences:
219.48 ms | 406 KiB | 354 Q