Web Lee » PHP

Secure Jquery Ajax Request

Lee — Thu, 25 Jun 2009 16:37:56 +0000

As we have seen in our previous Ajax requests we can grab data from different sources to output the the page. But what happens if the client has logged timmed out ? Trying to send the client to a login page can be a little more tricky than it sounds.

In this screencast I will show you a quick way to listen for unauthorized access and send the client to a login page.

Screen Time: 12:20

Please see below the key piece of code you will need.


	$().ajaxError(function(xhr, status, err){
   		if(status.status == 401)
   			window.location.href = '/welcome/login.php';
 	});

Simple Dom Helper For Codeigniter

Lee — Thu, 18 Jun 2009 00:31:38 +0000

Screen scraping with PHP Curl has always been a pain in the arse but Simple Html Dom makes the job a walk in the park.

Being that Simple HTML Dom is a class you would normally create a library fot it, but in this case it fits perfect as a helper. let me show you.

class Welcome extends Controller
{

	function __construct()
	{
		parent::Controller();
		$this->load->helper('dom');
	}

	public function index()
	{
		// Grab HTML From the URL
		$html = file_get_html('http://codeigniter.com/');

		// find all link on Codeigniter Site
		foreach($html->find('a') as $e)
    	echo $e->href . '
';
	}
}

Produces a list like this:

You cant get it much easier.

On the simple dom web site they give you good examples on how to use the parser and within the download they also give extended examples.

You can either download files from there site or download the ci dom helper and a copy of their files here .

Happy Scrapping.

Codeigniter Pagination Part 4

Lee — Fri, 12 Jun 2009 20:45:48 +0000

Hopefully this will be a fun screencast for you. We will be using Jquery $.ajax GET request combined with the Codeigniter Pagination Library.

Im sure you will be suprised how easy this is achieved.

Screen Time: 16:42

Download example files here .

Simple Jquery Ajax with Codeigniter Part 3

Lee — Mon, 08 Jun 2009 22:39:41 +0000

So now we have looked at the $.get request we now are going to look at the $.post request.

In this screencast we can see how we can submit form data through this request.

Screencast Time: 14:04

All download files will be displayed on the last post.

Simple Jquery Ajax with Codeigniter Part 2

Lee — Mon, 08 Jun 2009 15:17:47 +0000

Following on from part one in this screencast we will take a look at one of the Ajax functions $.get.

We will take a look at how to perfom a $.get request and how to handle the callback.

Screencast Time: 21:55

I will add a download on the last screecast of this series.

Codeigniter Pagination Part 3

Lee — Sun, 07 Jun 2009 11:45:14 +0000

OK so we have now covered setting up Codeigniter Pagination and passing some simple data through it. We have also managed to add categories to our posts to make it a little more interesting.

I thought in this screencast I will cover the other variables which are available to us and a real quick way to get it styled to.

Screencast Time: 11:48

You can download sample files here .

View and download some great styles for your pagination here.

Codeigniter Pagination Part 2

Lee — Sat, 06 Jun 2009 19:53:56 +0000

So leading on from the last screencast we now have some simple data being pushed through the pagination library.

Now were going to look at adding categorys to our posts and hopefully will pick up the next common mistake people make.

Sreencast Length: 11mins.

You can download sample file here .

Codeigniter Pagination Part 1

Lee — Sat, 06 Jun 2009 11:29:14 +0000

One of the biggest things I see being asked around the codeigniter forums & IRC channel is pagination. So I have decided to create a set of tutorials from basic setup to move advanced techniques on how to use this library.

In this screencast I will discuss how to get basic codeigniter pagination working with some simple data.

Screencast Length: 16:30

You can download sample files here .

Design supplid by Free CSS Templates

Codeigniter Preparation

Lee — Fri, 05 Jun 2009 20:46:07 +0000

Hopefully if I can keep my promise and will be rolling a set of screencast on this site and part of them will be to do with the Codeigniter Framework.

I though it would be best to start with codeigniter installation. This would be a base to start for future screencasts on codeigniter. Hopefully this screencast will demonstrate how to setup CI in a secure and safe method.

Screencast Length: 7:12

Just on some final notes the .htaccess file I have used works for me on my servers but you may need to adjust it depending on your host. Here are other useful setups.

If you got any more please be sure to share .

Added: Tools Used

E-TextEditor (the editor)
WinSCP (FTP client)