PHP构造JSon数据的两种方法

灰太狼 2022-08-18 00:59 192阅读 0赞

PHP构造JSon数据的方式有两种，下面我就用慕课网的一个例子来用这两个方法都构造一下。

我们需要构造出如下的JSon数据：

{
 
 "result": 1,
 
 "personData": [
 
 {
 
 "name": "nate",
 
 "age": 12,
 
 "url": "http://e.hiphotos.baidu.com/zhidao/pic/item/fcfaaf51f3deb48fa05af774f31f3a292df5786c.jpg",
 
 "schoolInfo": [
 
 {
 
 "school_name": "清华"
 
 },
 
 {
 
 "school_name": "北大"
 
 }
 
 ]
 
 },
 
 {
 
 "name": "jack",
 
 "age": 20,
 
 "url": "http://e.hiphotos.baidu.com/zhidao/pic/item/fcfaaf51f3deb48fa05af774f31f3a292df5786c.jpg",
 
 "schoolInfo": [
 
 {
 
 "school_name": "清华"
 
 },
 
 {
 
 "school_name": "北大"
 
 }
 
 ]
 
 }
 
 ]
 
 }

这两种方法如下：

1.使用数组array的方法构造：

<?php
 
 $arr = array();
 
 $arr['result'] = 1;
 
 $arr['personData'][0]['name']="nate";
 
 $arr['personData'][0]['age'] = 12;
 
 $arr['personData'][0]['url'] = "http://e.hiphotos.baidu.com/zhidao/pic/item/fcfaaf51f3deb48fa05af774f31f3a292df5786c.jpg";
 
 $arr['personData'][0]['schoolInfo'][0]['school_name']="清华";
 
 $arr['personData'][0]['schoolInfo'][1]['school_name']="北大";
 
 $arr['personData'][1]['name']="jack";
 
 $arr['personData'][1]['age'] = 12;
 
 $arr['personData'][1]['url'] = "http://e.hiphotos.baidu.com/zhidao/pic/item/fcfaaf51f3deb48fa05af774f31f3a292df5786c.jpg";
 
 $arr['personData'][1]['schoolInfo'][0]['school_name']="清华";
 
 $arr['personData'][1]['schoolInfo'][1]['school_name']="北大";
 
 
 
 $jsonobj = json_encode($arr);
 
 echo $jsonobj;
 
 ?>

这种方法虽然代码量比较小，但是看起来很乱，没有结构可言。

2.使用对象分装之后再转换成JSon：

<?php
 
 class Result {
 
 public $result;
 
 public $personData;
 
 public function setResult($result) {
 
 $this->result = $result;
 
 }
 
 public function getResult() {
 
 return $this->result;
 
 }
 
 
 
 public function setPersonData($personData) {
 
 $this->personData = $personData;
 
 }
 
 
 
 public function getPersonData() {
 
 return $this->personData;
 
 }
 
 }
 
 class PersonData {
 
 public $name;
 
 public $age;
 
 public $url;
 
 public $schoolInfo;
 
 
 
 public function setName($name) {
 
 $this->name=$name;
 
 }
 
 
 
 public function getName() {
 
 return $this->name;
 
 }
 
 
 
 public function setAge($age) {
 
 $this->age = $age;
 
 }
 
 
 
 public function getAge() {
 
 return $this->age;
 
 }
 
 
 
 public function setUrl($url) {
 
 $this->url = $url;
 
 }
 
 
 
 public function getUrl() {
 
 return $this->url;
 
 }
 
 
 
 public function setSchoolInfo($schoolInfo) {
 
 $this->schoolInfo = $schoolInfo;
 
 }
 
 
 
 }
 
 
 
 class SchoolInfo {
 
 public $school_name;
 
 public function __construct($school_name) {
 
 $this->school_name = $school_name;
 
 }
 
 }
 
 $schoolInfo = array();
 
 $schoolInfo[0] = new SchoolInfo("清华");
 
 $schoolInfo[1] = new SchoolInfo("北大");
 
 $res = new Result();
 
 $res->setResult(1);
 
 $personData1 = new PersonData();
 
 $personData1->setName("nate");
 
 $personData1->setAge(12);
 
 $personData1->setUrl("http://e.hiphotos.baidu.com/zhidao/pic/item/fcfaaf51f3deb48fa05af774f31f3a292df5786c.jpg");
 
 $personData1->setSchoolInfo($schoolInfo);
 
 
 
 $personData2 = new PersonData();
 
 $personData2->setName("jack");
 
 $personData2->setAge(20);
 
 $personData2->setUrl("http://e.hiphotos.baidu.com/zhidao/pic/item/fcfaaf51f3deb48fa05af774f31f3a292df5786c.jpg");
 
 $personData2->setSchoolInfo($schoolInfo);
 
 $personData = array();
 
 $personData[0] = $personData1;
 
 $personData[1] = $personData2;
 
 $res->setPersonData($personData);
 
 $objJSon = json_encode($res);
 
 echo $objJSon;
 
 //print_r($res);
 
 ?>

这种方法虽然代码量比较大（因 为要创建类~~），但是看起来结构清晰了很多，这里要注意的是，JSon只能自动获取公共的数据，也就是public修饰的数据域，所以其实没必要为每个 数据域设置get方法和set方法，上面我设置了这些方法是因为开始的时候不知道，结果输出结果是空的时候我才发现，所以这里就没有删掉，留下来做个笔 记~