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run code in 150+ php & hhvm versions
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<?php $first = array(); $second = array(1,2,3,4,5); $third = array_merge($first, $second); print_r($third);
Output for 4.3.0 - 7.1.0
Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 )