3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array(1,2,3); $b = array(3,4,5); $c = array_merge($a, $b); var_export($a); echo "\n"; var_export($b); echo "\n"; var_export($c); echo "\n";
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, 5.5.24 - 5.5.35, 5.6.8 - 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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
array ( 0 => 1, 1 => 2, 2 => 3, ) array ( 0 => 3, 1 => 4, 2 => 5, ) array ( 0 => 1, 1 => 2, 2 => 3, 3 => 3, 4 => 4, 5 => 5, )

preferences:
220.57 ms | 406 KiB | 338 Q