Head Rush Ajax

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Appendix I

using json from php

#4: Using JSON libraries in your PHP scripts

You’ve already seen how JSON can help you send and receive complex

objects in your Ajax apps. But for PHP scripts, you’re going to need a library

if you don’t want to type in your JSON manually. Here’s how you can use

JSON in your PHP scripts, without needing to type in the JSON by hand:

$order1 = array(‘name’ => ‘Jim’,

‘size’ => ‘large’,

‘beverage’ => ‘mocha’,

‘coffeemaker’ => 1);

$order2 = array(‘name’ => ‘Bob’,

‘size’ => ‘medium’,

‘beverage’ => ‘latte’,

‘coffeemaker’ => 2);

$orders =

array(‘coffeeOrders’ =>

array($order1, $order2));

$output = $json->encode($orders);

print($output);

JSON-PHP

Where to get it: http://mike.teczno.com/json.html

How to use it:

JSON-PHP is probably the easier JSON

library to use in your PHP scripts. It’s easy

to install and use.

require_once(‘JSON.php’);

$json = new Services_JSON();

First, use require_once()

to include the JSON.php

le you downloaded from

the JSON-PHP web site.

Create a new variable, and assign it a new

instance of the Services_JSON class. This

class will let you output JSON data from

your PHP data structures.

require_once() makes sure that the

JSON.php le is only loaded once, even if

multiple PHP scripts refer to JSON.php.

You can create arrays and

variables just as you normally

would in your PHP code.

When you’re ready to convert ...