How can I convert an array?

To help convert an array, there is an array in this structure: PHPcode $ arrarray (array (goods_id & gt; 1, sku_id & gt; 001, zk & gt; 0.5 ), array (goods_id & gt; 1, sku_id & gt; 002, zk & gt; 0.5), array (to help convert an array
There is an array in this structure

PHP code

  $arr = array(    array('goods_id'=>'1','sku_id'=>'001','zk'=>'0.5'),    array('goods_id'=>'1','sku_id'=>'002','zk'=>'0.5'),    array('goods_id'=>'1','sku_id'=>'006','zk'=>'0.5'),    array('goods_id'=>'2','sku_id'=>'003','zk'=>'0.8'),    array('goods_id'=>'2','sku_id'=>'004','zk'=>'0.8'),);

Convert

PHP code

  $_arr = array(    '1' =>array(                'zk'=>'0.5',                'mx'=>array(                    array('sku_id'=>'001','zk'=>'0.5'),                    array('sku_id'=>'002','zk'=>'0.5'),                    array('sku_id'=>'006','zk'=>'0.5'),                ),    '2' =>array(                'zk'=>'0.8',                'mx'=>array(                    array('sku_id'=>'003','zk'=>'0.8'),                    array('sku_id'=>'004','zk'=>'0.8'),                ),    ));

------ Solution --------------------

PHP code

  '1','sku_id'=>'001','zk'=>'0.5'),    array('goods_id'=>'1','sku_id'=>'002','zk'=>'0.5'),    array('goods_id'=>'1','sku_id'=>'006','zk'=>'0.5'),    array('goods_id'=>'2','sku_id'=>'003','zk'=>'0.8'),    array('goods_id'=>'2','sku_id'=>'004','zk'=>'0.8'),);foreach($arr as $v){    $tmp[$v['zk']]['zk']=$v['zk'];    $tmp[$v['zk']]['mx'][]=array_splice($v,1,2);}print_r(array_values($tmp));