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run code in 150+ php & hhvm versions
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<?php $a=array(10,20,30); $a = array_merge($a, array(100,200)); var_dump($a);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(5) { [0]=> int(10) [1]=> int(20) [2]=> int(30) [3]=> int(100) [4]=> int(200) }