php json

What is JSON?

JSON stands for JavaScript Object Notation, and is a syntax for storing and

exchanging data.

Since the JSON format is a text-based format, it can easily be sent to and

from a server, and used as a data format by any programming language.

PHP and JSON

PHP has some built-in functions to handle JSON.

First, we will look at the following two functions:

json_encode()

json_decode()

PHP - json_encode()

The json_encode() function is used to encode a value to JSON format.

Example

This example shows how to encode an associative array into a JSON object:

Example

This example shows how to encode an indexed array into a JSON array:

PHP - json_decode()

The json_decode() function is used to decode

a JSON object into a PHP object or an associative array.

Example

This example decodes JSON data into a

PHP object:

The json_decode() function returns an object

by default. The json_decode() function has a

second parameter, and when set to true, JSON objects are decoded into

associative arrays.

Example

This example decodes JSON data into a

PHP

associative array:

PHP - Accessing the Decoded Values

Here are two examples of how to access the decoded values from an object and

from an associative array:

Example

This example shows how to access the values from a PHP object:

Example

This example shows how to access the values from a

PHP associative array:

PHP - Looping Through the Values

You can also loop through the values with a foreach()

loop:

Example

This example shows how to loop through the values of a PHP object:

Example

This example shows how to loop through the

values of a PHP associative array: