If you are running CodeIgniter 1.7.2, there is a security flaw with the file upload class. (fixed on July 12, 2010)  The easiest way to install the patch is to use the standalone patch http://codeigniter.com/download_files/CI_1.7.2_201007_sec_patch.zip and unzip the file to the Code Igniter system/libraries folder.

Reading Excel files in CodeIgniter is actually very easy once you have the right documentation. The first thing you will need to do is utilize the CodeIgniter “Upload” library and add in the Excel Reader library for reading the files. The documentation on the CodeIgniter website in regards to this Excel Reader library is missing some details in implementation. This tutorial will go through the steps of installing the Excel reader library and getting an example implementation working.

I’ve been noticing that a lot of documentation in CakePHP seems to be spread out onto many different sites. In my opinion, the CakePHP manual isn’t comprehensive enough for learning.

Here’s a list of useful CakePHP resources I’ve used recently:

CakeForge – Great resource for Open Source CakePHP applications. This site has many more applications than the CakePHP Bakery.
http://cakeforge.org/

Bakery – How to use different CSS files in CakePHP
http://bakery.cakephp.org/articles/view/some-ideas-to-organize-your-css-files-and-autoload-them-in-cakephp

Giga Promoters – CakePHP tutorials and scripts:
http://www.gigapromoters.com/blog/category/cakephp/

I’ll be updating this list as I find more resources.

Here’s a quick tip to make cleaner looking URLs in CodeIgniter PHP framework. By default, if you have an application, the path of the application usually ends after index.php. Using Apache RewriteEngine, you can make cleaner looking URLs. You can have something similar to mysite.com/cigniter/MyApplication instead of mysite.com/cigniter/index.php/MyApplication