A brief analysis of json_encode() and json_decode() in php_PHP tutorial

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.

Copy code The code is as follows:

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.

converted into 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/776461.htmlTechArticlejson_encode() This function is mainly used to convert arrays and objects into json format. Copy the code as follows: $arr = array ('a'='a','b'='b','c'='c','d'='d','e'='e') ; echo json_encode($...