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<?php $arr1[0] = array('foo'=>'bar'); $arr2[0] = array('foo'=>'notbar'); $result = array_merge($arr1, $arr2); print_r($result);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Array ( [0] => Array ( [foo] => bar ) [1] => Array ( [foo] => notbar ) )