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);

?>