$list = array:4 [ 0 => array:7 [ "id" => 56 "mer_id" => 7 "order_id" => "wx163265961408769974" "is_postage" => 0 "store_name" => "奇柏丽" "postage" => "快递配送" "truePrice" => 42.0 ] 1 => array:7 [ "id" => 67 "mer_id" => 7 "order_id" => "wx163274484223537232" "is_postage" => 0 "store_name" => "奇柏丽" "postage" => "快递配送" "truePrice" => 208.0 ] 2 => array:7 [ "id" => 66 "mer_id" => 3 "order_id" => "wx163273502881634474" "is_postage" => 0 "store_name" => "俏丽小铺" "postage" => "快递配送" "truePrice" => 119.0 ] 3 => array:7 [ "id" => 68 "mer_id" => 1 "order_id" => "wx163279157705472302" "is_postage" => 1 "product_attr_unique" => "d973a4f5" "store_name" => "七七小铺" "postage" => "到店自提" "truePrice" => 120.0 ]]
在这个数组中以到店自提（postage）和 快递配送（postage）来分类，然后在此根本上再以商家为根本分类，用到的键名（is_postage，postage，mer_id，store_name）。
php代码实现
$new = []; foreach($list as $k => $item){ if($item['is_postage'] ==0 ){ $new[$item['is_postage']]['postage_name'] = "快递配送"; }else{ $new[$item['is_postage']]['postage_name'] = "到店自提"; } $new[$item['is_postage']]['postage'][$item['mer_id']]['store_name'] = $item['store_name']; $new[$item['is_postage']]['postage'][$item['mer_id']]['store'][$k] = $item;}dump($new);order输出结果：array:2 [ 0 => array:2 [ "postage_name" => "快递配送" "aa" => array:2 [ 7 => array:2 [ "store_name" => "奇柏丽" "store" => array:2 [ 0 => array:7 [ "id" => 56 "mer_id" => 7 "order_id" => "wx163265961408769974" "is_postage" => 0 "store_name" => "奇柏丽" "postage" => "快递配送" "truePrice" => 42.0 ] 1 => array:7 [ "id" => 67 "mer_id" => 7 "order_id" => "wx163274484223537232" "is_postage" => 0 "store_name" => "奇柏丽" "postage" => "快递配送" "truePrice" => 208.0 ] ] ] 3 => array:2 [ "store_name" => "俏丽小铺" "store" => array:1 [ 2 => array:7 [ "id" => 66 "mer_id" => 3 "order_id" => "wx163273502881634474" "is_postage" => 0 "store_name" => "俏丽小铺" "postage" => "快递配送" "truePrice" => 119.0 ] ] ] ] ] 1 => array:2 [ "postage_name" => "到店自提" "aa" => array:1 [ 1 => array:2 [ "store_name" => "七七小铺" "store" => array:1 [ 3 => array:7 [ "id" => 68 "mer_id" => 1 "order_id" => "wx163279157705472302" "is_postage" => 1 "store_name" => "七七小铺" "postage" => "到店自提" "truePrice" => 120.0 ] ] ] ] ]]
