3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array('A' => 1, 'B' => 2, 'C' => 3); $b = array('B' => 6, 'D' => 7, 'E' => 8); $c = array_merge($a, $b); var_dump($a); var_dump($b); var_dump($c);
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 - 7.1.20, 7.2.29 - 7.2.33, 7.3.16 - 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) { ["A"]=> int(1) ["B"]=> int(2) ["C"]=> int(3) } array(3) { ["B"]=> int(6) ["D"]=> int(7) ["E"]=> int(8) } array(5) { ["A"]=> int(1) ["B"]=> int(6) ["C"]=> int(3) ["D"]=> int(7) ["E"]=> int(8) }

preferences:
226.04 ms | 406 KiB | 309 Q