3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array1 = array( 'a' => 1, 'b' => 2, ); $array2 = array( 'b' => 22, 'c' => 3, ); var_dump(array_merge($array1, $array2));
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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
array(3) { ["a"]=> int(1) ["b"]=> int(22) ["c"]=> int(3) }
preferences:
216.11 ms | 406 KiB | 357 Q