Json encode, Json decode

1. Json encode

- Returns a string containing the JSON representation of the supplied value.

- Returns a JSON encoded string on success or false on failure.

- Basic
$arr = array('a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5);
#{"a":1,"b":2,"c":3,"d":4,"e":5}

- Array(array)
$c = array(array(1,2,3));
#json_encode($c) : [[1,2,3]]
#json_encode($c, JSON_FORCE_OBJECT) : {"0":{"0":1,"1":2,"2":3}}

- Array(key=>value)
$d = array('foo' => 'bar', 'baz' => 'long');
#json_encode($d) : {"foo":"bar","baz":"long"}

 

2. Json decode

- Takes a JSON encoded string and converts it into a PHP value.

- Returns the value encoded in json as an appropriate PHP type.

(pram associative : false - return arrays / true - return objects)

 

$json = '{"foo-bar": 12345}';

$obj = json_decode($json);

//$obj 접근 가능
$obj->{'foo-bar'}; #12345

* If the name and value is string, must be enclosed in double quotes

 

 

https://www.php.net/manual/en/function.json-encode.php

PHP: json_encode - Manual