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run code in 300+ PHP versions simultaneously
<?php $arr1 = array('bundle1', 'bundle2'); $arr2 = array('bundle2', 'bundle1'); var_dump(array_merge($arr1, $arr2)); var_dump($arr1 + $arr2);
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(4) { [0]=> string(7) "bundle1" [1]=> string(7) "bundle2" [2]=> string(7) "bundle2" [3]=> string(7) "bundle1" } array(2) { [0]=> string(7) "bundle1" [1]=> string(7) "bundle2" }

preferences:
235.85 ms | 406 KiB | 336 Q