php 配列のキャッシュマージ

//合并itemsearch的结果
	private function mergeList(&$arr)
	{
		$data = array();
		$n = &$arr;
		foreach ($n as $key => $value) {
			if(!$value) continue;
			array_push($data,$this->getItem($value,$n));
		}
		return array_filter($data);
	}
	private function getItem(&$item,&$arr){
		foreach ($arr as $key => $value) {
			if(!$value) {
				continue;
			};
			if($item["itemTypeName"] == $value["itemTypeName"]
			&& $item["weight"] == $value["weight"]
			&& $item["type"] == $value["type"]){
				if($item["itemTypeId"] == $value["itemTypeId"]
					&& $item["warehouseId"] == $value["warehouseId"]){
					continue;	
				}else{
					$item["stockIn"] += $value["stockIn"];
					$item["remain"] += $value["remain"];
					$item["stockOut"] += $value["stockOut"];
					$item["stockIn"] = sprintf("%.4f",$item["stockIn"]);
					$item["remain"] = sprintf("%.4f",$item["remain"]);
					$item["stockOut"] = sprintf("%.4f",$item["stockOut"]);
					$arr[$key] = "";
				}
			}
		}
		return $item;
	}