``` <?php $d = array( array('id'=>'11','name'=>'Tom'), array('id'=>'22','name'=>'Mary'), array('id'=>'33','name'=>'Peter'), array('id'=>'44','name'=>'Jack') ); $stack = array(); foreach ($d as $key => $value) { array_push($stack, array('name'=>$value['name'])); } echo json_encode($stack); ?> ```