PHP JSON PHP

PHP JSON  

PHP JSON

PHP JSON

PHP allows us to encode and decode JSON by the help of json_encode() and json_decode functions.

1) PHP json_encode

The json_encode() function returns the JSON representation of a value. In other words, it converts PHP variable (containing array) into JSON.

Syntax:

  1. string json_encode ( mixed $value [, int $options = 0 [, int $depth = 512 ]] )  

PHP json_encode example 1

Let's see the example to encode JSON.

  1. <?php  
  2. $arr = array('a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5);  
  3. echo json_encode($arr);  
  4. ?>  

Output

{"a":1,"b":2,"c":3,"d":4,"e":5}

PHP json_encode example 2

Let's see the example to encode JSON.

  1. <?php  
  2. $arr2 = array('firstName' => 'Rahul', 'lastName' => 'Kumar', 'email' => 'rahul@gmail.com');    
  3. echo json_encode($arr2);  
  4. ?>  

Output

{"firstName":"Rahul","lastName":"Kumar","email":"rahul@gmail.com"}
 

2) PHP json_decode

The json_decode() function decodes the JSON string. In other words, it converts JSON string into a PHP variable.

Syntax:

  1. mixed json_decode ( string $json [, bool $assoc = false [, int $depth = 512 [, int $options = 0 ]]] )  

PHP json_decode example 1

Let's see the example to decode JSON string.

  1. <?php  
  2. $json = '{"a":1,"b":2,"c":3,"d":4,"e":5}';  
  3. var_dump(json_decode($json, true));//true means returned object will be converted into associative array  
  4. ?>  

Output

array(5) {
    ["a"] => int(1)
    ["b"] => int(2)
    ["c"] => int(3)
    ["d"] => int(4)
    ["e"] => int(5)
}

PHP json_decode example 2

Let's see the example to decode JSON string.

  1. <?php  
  2. $json2 = '{"firstName" : "Rahul", "lastName" : "Kumar", "email" : "rahul@gmail.com"}';    
  3. var_dump(json_decode($json2, true));  
  4. ?>  

Output

array(3) {
["firstName"]=> string(5) "Rahul"
["lastName"]=> string(5) "Kumar"
["email"]=> string(15) "rahul@gmail.com"
}

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