Use of JSON in php

Starting from version 5.2, PHP provides native json_encode () and json_decode () functions. The former is used for encoding and the latter is used for decoding.

Json_encode ()

This function is mainly used to convert arrays and objects to json format.

$arr = array ('a'=>'a','b'=>'b','c'='c','d'=>'d','e'='e');echo json_encode($arr);

Output result:

Json only accepts UTF-8 encoded characters. The json_encode () parameter must be UTF-8 encoded.

class person{    public $name;    public $age;    public $height;    function __construct($name,$age,$height)    {        $this->name = $name;        $this->age = $age;        $this->height = $height;        }   }$obj = new person("zhangsan",20,100);$foo_json = json_encode($obj);echo $foo_json;

Output result:

When the attribute in the class is a private variable, it is not output.

Json_decode ()

This function is used to convert json text to the corresponding PHP data structure.

$json = '{"a":"hello","b":"world","c":"zhangsan","d":20,"e":170}';var_dump(json_decode($json));

Output result:

In general, json_decode () always returns a PHP Object.

Convert to an array:

$json = '{"a":"hello","b":"world","c":"zhangsan","d":20,"e":170}';var_dump(json_decode($json,ture));

 

 

 

Reprinted please indicate the source: http://www.cnblogs.com/yydcdut/p/3751141.html