json

<?php

//1.将一维数组转换成json格式

$arr1 = array(); $arr1["name"] = "zhangsan";

$arr1["age"] = 25; $arr1["address"] = "安徽";

echo json_encode($arr1);

//{"name":"zhangsan","age":25,"address":"u5b89u5fbd"} echo "<hr/>";

//2.将多维数组转换成json格式

$arr2 = array();

$arr2["users"]["beijing"]["username"] = "gem";

$arr2["users"]["beijing"]["age"] = 22;

$arr2["users"]["anhui"]["username"] = "wolf";

$arr2["users"]["anhui"]["age"] = 23; echo json_encode($arr2);

//{"users":{"beijing":{"username":"gem","age":22},"anhui":{"username":"wolf","age":23}}}

echo "<hr/>";

//3.将对象转换为json格式

class Person{

 public $name;

public function setName($name){

$this->name = $name;

}

}

$p = new Person();

$p->setName("lisi");

echo json_encode($p);

//{"name":"lisi"}类的属性为私有变量时不会输出

echo "<hr/>";

//4.将json格式转换为数组格式

$json = '{"users":{"beijing":{"username":"gem","age":22},"anhui":{"username":"wolf","age":23}}}';

var_dump(json_decode($json,true));