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CodeIgniter at a Glance

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CodeIgniter is an Application Framework

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CodeIgniter is a toolkit for people who build web applications using +PHP. Its goal is to enable you to develop projects much faster than you +could if you were writing code from scratch, by providing a rich set of +libraries for commonly needed tasks, as well as a simple interface and +logical structure to access these libraries. CodeIgniter lets you +creatively focus on your project by minimizing the amount of code needed +for a given task.

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CodeIgniter is Free

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CodeIgniter is licensed under the MIT license so you can use it however +you please. For more information please read the +license agreement.

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CodeIgniter is Light Weight

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Truly light weight. The core system requires only a few very small +libraries. This is in stark contrast to many frameworks that require +significantly more resources. Additional libraries are loaded +dynamically upon request, based on your needs for a given process, so +the base system is very lean and quite fast.

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CodeIgniter is Fast

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Really fast. We challenge you to find a framework that has better +performance than CodeIgniter.

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CodeIgniter Uses M-V-C

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CodeIgniter uses the Model-View-Controller approach, which allows great +separation between logic and presentation. This is particularly good for +projects in which designers are working with your template files, as the +code these files contain will be minimized. We describe MVC in more +detail on its own page.

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CodeIgniter Generates Clean URLs

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The URLs generated by CodeIgniter are clean and search-engine friendly. +Rather than using the standard “query string” approach to URLs that is +synonymous with dynamic systems, CodeIgniter uses a segment-based +approach:

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example.com/news/article/345
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Note

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By default the index.php file is included in the URL but it can +be removed using a simple .htaccess file.

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CodeIgniter Packs a Punch

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CodeIgniter comes with full-range of libraries that enable the most +commonly needed web development tasks, like accessing a database, +sending email, validating form data, maintaining sessions, manipulating +images, working with XML-RPC data and much more.

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CodeIgniter is Extensible

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The system can be easily extended through the use of your own libraries, +helpers, or through class extensions or system hooks.

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CodeIgniter Does Not Require a Template Engine

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Although CodeIgniter does come with a simple template parser that can +be optionally used, it does not force you to use one. Template engines +simply can not match the performance of native PHP, and the syntax that +must be learned to use a template engine is usually only marginally +easier than learning the basics of PHP. Consider this block of PHP code:

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<ul>
+<?php foreach ($addressbook as $name):?>
+        <li><?=$name?></li>
+<?php endforeach; ?>
+</ul>
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Contrast this with the pseudo-code used by a template engine:

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<ul>
+{foreach from=$addressbook item="name"}
+        <li>{$name}</li>
+{/foreach}
+</ul>
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Yes, the template engine example is a bit cleaner, but it comes at the +price of performance, as the pseudo-code must be converted back into PHP +to run. Since one of our goals is maximum performance, we opted to not +require the use of a template engine.

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CodeIgniter is Thoroughly Documented

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Programmers love to code and hate to write documentation. We’re no +different, of course, but since documentation is as important as the +code itself, we are committed to doing it. Our source code is extremely +clean and well commented as well.

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CodeIgniter has a Friendly Community of Users

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Our growing community of users can be seen actively participating in our +Community Forums.

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