Doctrine is (as they describe it on the website):

Doctrine is a PHP ORM (object relational mapper) for PHP 5.2.3+ that sits on top of a powerful PHP DBAL (database abstraction layer). One of its key features is the ability to optionally write database queries in an OO (object oriented) SQL-dialect called DQL inspired by Hibernates HQL. This provides developers with a powerful alternative to SQL that maintains a maximum of flexibility without requiring needless code duplication.

The tutorial walks you step-by-step through the process of integrating Doctrine with CodeIgniter and then dives even deeper into topics such as model relationships, hooks, profiling, DQL, templates, and data hydrators. Overall, it’s a very thorough tutorial.

• Day 1: Install and Setup
• Day 2: The Basics
• Day 3: User Signup Form
• Day 4: User Login
• Day 5: Database CRUD
• Day 6: Models with Relationships
• Day 7: Fixtures & Forum List
• Day 8: Hooks, Profiling & DQL
• Day 9: Templates & Data Hydrators
• Day 10: …coming soon

FYI – In the end I decided against using Doctrine in my project, as it added a bit too much weight and required that I mess with yet another layer. But you stand to lose nothing going through these tutorials, you will learn a lot even if you decide against Doctrine in the end.

Screencasts

• Day 1: Getting Started With the Framework
• Day 2: Database Selecting Methods
• Day 3: Sending Emails
• Day 4: Newsletter Signup
• Day 5: CRUD
• Day 6: Login
• Day 7: Pagination

Tutorials

• Everything You Need to Get Started with CodeIgniter – Net Tuts
• Getting Started with CodeIgniter – IBM
• Tips for Getting Started Building an Application Using CodeIgniter – Derek Allard
• Getting Started with CodeIgniter – Source Bits
• Getting Started CodeIgniter Book

Screencasts

• Hello World – Introduction to CodeIgniter – CodeIgniter Website
• Create a Blog in 20 Minutes – CodeIgniter
• Easy Development with CodeIgniter – Net Tuts

The CodeIgniter User Guide gives this example:

RewriteEngine on
RewriteCond $1 !^(index\.php|images|robots\.txt)
RewriteRule ^(.*)$ /index.php/$1 [L]

But this has a tendency to fail for most people, who must then resort to the forums.

A more elaborate solution can be found in the CodeIgniter Forums.

<IfModule mod_rewrite.c>
   RewriteEngine On
   RewriteBase /
      #Removes access to the system folder by users.
      #Additionally this will allow you to create a System.php controller,
      #previously this would not have been possible.
      #'system' can be replaced if you have renamed your system folder.
   RewriteCond %{REQUEST_URI} ^system.*
   RewriteRule ^(.*)$ /index.php?/$1 [L]
      #Checks to see if the user is attempting to access a valid file,
      #such as an image or css document, if this isn't true it sends the
      #request to index.php
   RewriteCond %{REQUEST_FILENAME} !-f
   RewriteCond %{REQUEST_FILENAME} !-d
   RewriteRule ^(.*)$ index.php?/$1 [L]
</IfModule>
<IfModule !mod_rewrite.c>
      # If we don't have mod_rewrite installed, all 404's
      # can be sent to index.php, and everything works as normal.
      # Submitted by: ElliotHaughin
   ErrorDocument 404 /index.php
</IfModule>
   AddHandler php5-script .php


This should take care of your problem. If not shoot me a comment and I’ll see what I can do to help.

I really have nothing negative to say about the user guide that comes standard with every download. It is a wonderful reference whether you are just beginning, or a seasoned developer in CodeIgniter.

PDF & PNG

• CodeIgniter 1.6.3 PDF
• CodeIgniter 1.7 PDF Printable Copy
• CodeIgniter Reference Sheet

Compared to the list I published for jQuery, the list of resources available for CodeIgniter is much smaller. Some might consider that a downside to choosing it as a framework, but I have always looked at it another way. The lack of third-party documentation of CodeIgniter highlights just how great the included user guide really is.  I’ve never needed another reference (except the occasional cheat sheet) and I don’t think you will either.

As many of you know, CodeIgniter and jQuery work beautifully together, and both communities have worked tirelessly to provide everyone with helpful tips and tutorials. And while there are already plenty of resources out there, I have a difficult time finding one place where they are all pulled together.

This will soon be that place.