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PHP JSON Example


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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