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run code in 150+ php & hhvm versions
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<?php $array1 = array(1,2,3); $array2 = array(4,5,6); var_dump($array1 + $array2);
Output for 4.3.0 - 7.1.0
array(3) { [0]=> int(1) [1]=> int(2) [2]=> int(3) }