浅析php中json_encode()和json_decode()
author:一佰互联 2019-04-29   click:184

json_encode()                                                                      

该函数主要用来将数组和对象,转换为json格式。

复制代码 代码如下:
$arr = array ("a"=>"a","b"=>"b","c"="c","d"=>"d","e"="e");
echo json_encode($arr);

输出结果:

json只接受utf-8编码的字符,json_encode()的参数必须是utf-8编码。

复制代码 代码如下:
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;

输出结果:

当类中的属性为私有变量的时候,则不会输出。

json_decode()                                                                      

该函数用于将json文本转换为相应的PHP数据结构。

复制代码 代码如下:
$json = "{"a":"hello","b":"world","c":"zhangsan","d":20,"e":170}";
var_dump(json_decode($json));

输出结果:

通常情况下,json_decode()总是返回一个PHP对象。

转成数组的:

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