PHP构造JSon数据的两种方法

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：

<span style="font-size:18px;">{

"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"

}

]

}

]

}</span>

这两种方法如下：

1.使用数组array的方法构造：

<span style="font-size:18px;"><?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;

?></span>

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：

<span style="font-size:18px;"><?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);

?></span>

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~