浅析php中json_encode()和json_decode()
json_encode()
该函数主要用来将数组和对象,转换为json格式。
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。
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 = $height; } } <p>$obj = new person("zhangsan",20,100); $foo_json = json_encode($obj); echo $foo_json; </p>
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。
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:
代码如下:
$json = '{"a":"hello","b":"world","c":"zhangsan","d":20,"e":170}'; var_dump(json_decode($json,ture));
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