How to use JSON in php, how to use phpJSON_PHP tutorial

How to use JSON in php, how to use phpJSON

Starting from version 5.2, PHP natively provides 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 into json format.

Copy code 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 result:

When the attributes in the class are private variables, they will not be output.
json_decode()                                                                                             This function is used to convert json text into the corresponding PHP data structure.

Copy code 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.

Convert to array:

Copy code 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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www.bkjia.comtruehttp: //www.bkjia.com/PHPjc/992544.htmlTechArticleHow to use JSON in php. 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() This...