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run code in 150+ php & hhvm versions
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<?php $a = array(1, 2, 3, 4, 5); $b = array(6, 7, 8, 9); $c = array_merge($a, $b); var_dump($c);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(9) { [0]=> int(1) [1]=> int(2) [2]=> int(3) [3]=> int(4) [4]=> int(5) [5]=> int(6) [6]=> int(7) [7]=> int(8) [8]=> int(9) }