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In PHP, you can operate json through the "json_encode()" and "json_decode()" functions, whose syntax is "json_encode($arr);" and "json_decode($json)" respectively.
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Starting from version 5.2, PHP natively provides json_encode() and json_decode () function, the former is used for encoding and the latter is used for decoding.
json_encode() .
The code is as follows:$arr = array ('a'=>'a','b'=>'b','c'='c','d'=>'d','e'='e'); echo json_encode($arr);Output result: json only accepts utf-8 encoded characters, and the parameters of json_encode() 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 results: When the attributes in the class are private variables, they will not be output.
json_decode()
The code is as follows:
$json = '{"a":"hello","b":"world","c":"zhangsan","d":20,"e":170}'; var_dump(json_decode($json));Output result:Normally, json_decode() always returns a PHP object. Converted to an array: The code is as follows:
$json = '{"a":"hello","b":"world","c":"zhangsan","d":20,"e":170}'; var_dump(json_decode($json,ture));
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