PHP JSON

PHP JSON

In this chapter we will introduce how to use PHP language to encode and decode JSON objects.

Environment configuration

JSON extension has been built-in in php5.2.0 and above.

JSON function

json_encode

PHP json_encode() is used to JSON encode variables. This function returns JSON data if executed successfully, otherwise it returns FALSE.

Syntax

string json_encode ($value [, $options = 0])

Parameters

· Value: The value to be encoded. This function is only valid for UTF-8 encoded data.

· options: Binary mask composed of the following constants: JSON_HEX_QUOT, JSON_HEX_TAG, JSON_HEX_AMP, JSON_HEX_APOS, JSON_NUMERIC_CHECK, JSON_PRETTY_PRINT, JSON_UNESCAPED_SLASHES, JSON_FORCE_OBJECT

Example

The following example demonstrates Got it How to convert PHP array to JSON format data:

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

The execution result of the above code is:

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

The following example demonstrates how to convert PHP objects into JSON format data:

name = "sachin"; $e->hobbies = "sports"; $e->birthdate = date('m/d/Y h:i:s a', "8/5/1974 12:20:03 p"); $e->birthdate = date('m/d/Y h:i:s a', strtotime("8/5/1974 12:20:03")); echo json_encode($e); ?>

The execution result of the above code is:

{ "name":"sachin","hobbies":"sports","birthdate":"08\/05\/1974 12:20:03 pm"}

json_decode

PHP The json_decode() function is used to decode JSON format strings and convert them into PHP variables.

Syntax

mixed json_decode ($json [,$assoc = false [, $depth = 512 [, $options = 0 ]]])

Parameters

· json_string: The JSON string to be decoded must be UTF-8 encoded data

· assoc: When this parameter is TRUE, an array will be returned, and when FALSE, an object will be returned.

· depth: A parameter of integer type, which specifies the recursion depth

· options: Binary mask, currently only JSON_BIGINT_AS_STRING is supported.

Example

The following example demonstrates how to decode JSON data:

The execution result of the above code is:

object(stdClass)#1 (5) {

["a"] => int(1)

["b"] => int(2)

["c"] => ; int(3)

["d"] => int(4)

["e"] => int(5)

}

array(5) {

["a"] => int(1)

["b"] => int(2)

["c"] => int(3)

["d"] => int(4)

["e"] => int(5)

}