UPDATE: Someone else is moving forward with SAjax. Since my code has deviated away from some of the SAjax design goals, I suggest you try his site out first if you’re interested in support for the original SAjax library.
I have been using SAjax 0.12 (by the folks at ModernMethod) for a couple of years now and I think it’s the greatest think since sliced bread. SAjax allowed me to quickly learn the very exciting and helpful technology that is known as Ajax (asynchronous JavaScript and XML). Ajax allows you to do all sorts of cool stuff (post data without a page refresh, get small HTML fragments to add to an existing document, etc).
SAjax is great, but I found that I was doing a lot of repetitive work and I wanted to simplify it even more. This project is the result of my effort. I have posted it on Google’s Code project for anyone who is interested in downloading it. It can be found here. Note: I believe this code will only work with PHP 5.2 or higher since it relies on json_encode/json_decode (although you might be able to add this via PECL). I will be including more documentation and code examples at my leisure or if anyone wants it sooner 
So what does this re-release include? Here are some of the features:
- Backwards compatible with Sajax.php 0.12. I have only done basic testing to verify this, so if you encounter problems feel free to let me know.
- New object-oriented interface via a singleton object: Sajax::Sajax()
- Ability to export object methods to JavaScript.
- Object-oriented JavaScript interface via the ‘sajax‘ object, e.g.: sajax.SomeMethod(cb)
- Ability to pass DOM objects through via stubbed calls:, e.g. sajax.SomeMethod(this.form, cb)
- Provides additional debugging information from the server side when debugging is turned on.
- Provides interface for rendering additional JavaScript, either through externally referenced libraries or via code blocks.
Here is the obligitory implementation example:
<?php
/*
* Demonstration of SAjax 0.14
* Written by Kristian Oye
* April 19th, 2009
*/
include_once("Sajax.php");
class TestClass
{
public $ValueString = "Hello World";
public $ValueInt = 42;
public function GetString()
{
return $this->ValueString;
}
public function SajaxGetNumber()
{
return $this->ValueInt;
}
public function SajaxGetObject()
{
return $this;
}
public function SajaxCalculate($form, $op = 'add')
{
Sajax::Sajax()->AddDebugMessage("SajaxCalculate(".json_encode($form).", $op) called.");
if($op === 'add')
return ($form->param1 + $form->param2);
elseif($op === 'subtract')
return ($form->param1 - $form->param2);
elseif($op === 'multiply')
return ($form->param1 * $form->param2);
elseif($op == 'divide')
return ($form->param1 / $form->param2);
}
}
function GetRandom()
{
return rand(1, 100);
}
// Create a class to handle some of our requests.
$foo = new TestClass();
$sjax = Sajax::Sajax();
// Turn debugging on
$sjax->EnableDebug(true);
// Export our callable methods
$sjax->Export(
// Export all 'Sajax' methods in TestClass
$foo,
// Export the callback to GetString in TestClass
array($foo, 'GetString'),
// Simple method export
'GetRandom',
// Non-existant methods
'TestClass::GetError',
'GetSomeError');
// An additional script to include in our header.
$sjax->AddScriptReference('/static/example.js');
// Handle the request if it is for AJAX or for a
// JavaScript document, otherwise continue as normal.
$sjax->HandleRequest();
?>
<html>
<head>
<title>Sajax Test</title>
<?php $sjax->ExportIncludeJS(); ?>
<script type="text/javascript">
function cb_Calculate(result)
{
document.getElementById('CalcResult').innerHTML = result;
}
</script>
</head>
<body>
<table>
<tr>
<td>Get a string:</td/>
<td colspan="2">
<input type="button"
value="Go"
onclick="sajax.GetString(function(result) { alert(result); })" /></td>
</tr>
<tr>
<td>Get a number:</td/>
<td colspan="2">
<input type="button"
value="Go"
onclick="sajax.GetNumber(function(result) { alert(result); })" /></td>
</tr>
<tr>
<td>Get a random:</td/>
<td colspan="2">
<input type="button"
value="Go"
onclick="sajax.GetRandom(function(result) { alert(result); })" /></td>
</tr>
<tr>
<td>Get an object:</td/>
<td colspan="2">
<input type="button"
value="Go"
onclick="sajax.GetObject(function(result) { alert(result); })" /></td>
</tr>
<tr>
<td>Get an ERROR:</td/>
<td colspan="2">
<input type="button"
value="Go"
onclick="sajax.GetError(function(result) { alert(result); })" /></td>
</tr>
<tr>
<td>ANOTHER error:</td/>
<td colspan="2">
<input type="button"
value="Go"
onclick="sajax.GetSomeError(function(result) { alert(result); })" /></td>
</tr>
<tr>
<form action="/bogus" method="get">
<td style='vertical-align:top'>Calculate:</td>
<td style='vertical-align:top'>
<input type="text"
value="0"
id="param1"
name="param1" /></td>
<td>
<input type="button"
value=" + "
onclick="sajax.Calculate(this.form, 'add', cb_Calculate)" />
<input type="button"
value=" - "
onclick="sajax.Calculate(this.form, 'subtract', cb_Calculate)" />
<input type="button"
value=" * "
onclick="sajax.Calculate(this.form, 'multiply', cb_Calculate)" />
<input type="button"
value=" / "
onclick="sajax.Calculate(this.form, 'divide', cb_Calculate)" /></td>
<td style='vertical-align:top'>
<input type="text"
value="0"
id="param2"
name="param2" /> = <span id="CalcResult"></span></td>
</form></tr>
</table>
</body>
</html>
