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@ 2014-09-07T00:51:12Z

<?php

$arr = array( array("item_data"=>array(1,2,3)), array("item_data"=>array(4,5,6)), array("item_data"=>array(7,8,9)) );

    function merge($prev, $now) {
        return array_merge($prev, $now['item_data']);
    }
    array_reduce($arr, "merge", array());

Output
Performance
VLD
References
Branches

array_reduce: documentation ( source)
array_merge: documentation ( source)

preferences:dark modelive preview

40.9 ms | 402 KiB | 5 Q