php怎样读取本地的json文件

{
	"goods":[
		{
			"type":1,
			"name":"wow精选",
			"product":[
				{
					"id":98,
					"name":"真皮大衣",
					"title":"单桶原酿酒 威士忌 新春礼盒 限量独家",
					"titleDesc":"苏格兰麦芽糖，中国定制版",
					"price":1298.00
				},
				{
					"id":99,
					"name":"品牌内衣",
					"title":"单桶原酿酒 威士忌 新春礼盒 限量独家222",
					"titleDesc":"苏格兰麦芽糖，中国定制版222",
					"price":1298.00
				}
			]
		},
		{
			"type":2,
			"name":"特惠商品",
			"product":[]
		}
	]
	
	
}

 <?php
  echo "获取页面传来的参数";
  $type = $_GET['type'];
  $proId = $_GET['id'];
  echo $type."产品type";
  echo $proId."产品Id";
  // 从文件中读取数据到PHP变量 
  $json_string = file_get_contents('json/data.json'); 
   
  // 用参数true把JSON字符串强制转成PHP数组 
  $data = json_decode($json_string, true); 
   
  // 显示出来看看 
  // var_dump($json_string); 
  // var_dump ($data); 
  // print_r($data); 
  //产品循环
  function foreachFun($d,$type,$proId)
  {
   foreach ($d["goods"] as $key => $value) {
     if($value["type"] == $type){
      $results = $value;
     }
   }
   foreach ($results["product"] as $key => $value) {
     if($value["id"] == $proId){
      $result = $value;
     }
   }
   return $result;
  }
  $res = foreachFun($data,$type,$proId);
  print_r($res);
 ?>