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<?php $arr = array( array("item_data"=>array(1,2,3),"type"=>a), array("item_data"=>array(4,5,6)), array("item_data"=>array(7,8,9)) ); var_dump($arr); function merge($prev, $now) { return array_merge($prev, $now['item_data']); } $res = array_reduce($arr, "merge", array()); print_r($res);
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught Error: Undefined constant "a" in /in/Hu0at:3 Stack trace: #0 {main} thrown in /in/Hu0at on line 3
Process exited with code 255.

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