Found article for working with both codeigniter and wordpress, it may not directly answer the question but it may help. Article full quoted to ensure content availability.
August 12, 2015 CometChat Team It comes as little surprise that many
website owners and administrators still prefer WordPress as their
primary Content Management System (CMS), and you can’t blame them
considering the comprehensive features that WordPress has to offer.
However, when it comes to creating customized applications, WordPress
is on the back burner as it is not a suitable tool due to many
reasons. But, the ease of management and updates on the CMS are too
hard to give up, which is why many website owners today prefer to use
CodeIgniter for application building.
CodeIgniter is a lightweight PHP framework that can help in developing
applications that can be integrated with WordPress, which I will
explain shortly. While some users prefer developing the CodeIgniter
and WordPress elements separately, we will go through an example where
the primary navigation and footer are similar in both platforms,
because it doesn’t make much sense to update the navigation and footer
As WordPress is our primary application here, we will use its
functionality within CodeIgniter while keeping the CodeIgniter app in
Here is a step by step guide to integrating CodeIgniter app with
- Add the WordPress Bootstrap File We’ll take a look at the case study of Phil Palmieri to help us understand how to integrate
CodeIgniter with WordPress. The wp-load.php file will immediately
precede the CodeIgniter bootstrap file in the index.php.
file: We took a cue from Phil Palmieri and referenced WordPress’s
wp-load.php file immediately preceding the call to CodeIgniter
bootstrap file in CI’s index.php file:
* LOAD THE BOOTSTRAP FILE
* Here we go
*/ //Load WordPress file. require_once('/Server/path/to/wp-load.php'); require_once BASEPATH.'core/CodeIgniter.php'; Easy right?
Now before we add WordPress functionality to the CodeIgniter CI’s
file, we will perform a test to make sure everything is alright. As
you can see from the same above, all the links and URLs within the
CodeIgniter app will link back to the root directory of WordPress,
which results in a 404 error.
Since both CodeIgniter and WordPress have “site_url” functionality,
we’ll still get the error even when the WordPress bootstrap file is
loaded before CodeIgniter bootstrap file. However, by installing a
Runkit PHP extension, we can overwrite the global function, provided
that we have both site_url functions for WordPress and CodeIgniter in
2.Extend Codeigniter URL Helper We will now create a new namespaced function to ‘extend’ the URL helper of CodeIgniter. By using
ci_site_url, we can resolve the site_url issue. The My_url_helper.php
(helper) file should be in the application directory of CodeIgniter.
3.Change site_url to ci_site_url in CodeIgniter App. Quick search your applications, controllers, models, and directories and replace all
site_url file references with ci_site_url.
4.Stop WordPress from Contorting Cookies! You might experience an issue where CodeIgniter will create cookies for every active database
session when you log in. This can lead to WordPress bootstrap file
rectifying the issue. This happens when WordPress loops via the
$_COOKIE global and implements add_magic_quotes functionality to all
elements, except the CodeIgniter cookie. Following is the code to
resolve this issue.
Scroll to Line 520 and add this function: (Let’s say you’re using CI's
default ci_session key)
* Applies Magic Quotes to the $_COOKIE global but ignores Codeigniter's Cookie
* @param string $value Value passed by array_walk function
* @param string $key Key passed by array_walk function
if($key != "ci_session")
Comment out the following lines inside the wp_magic_quotes function
and add a reference to the ci_ignore_magic_quotes function.
//$_COOKIE = add_magic_quotes( $_COOKIE );
Additionally, you will have to set WordPress to not unset the
$no_unset = array( 'GLOBALS', '_GET', '_POST', '_COOKIE', '_REQUEST',
'_SERVER', '_ENV', '_FILES', 'table_prefix','ci_session' );
Once all the steps are complete, you can start using WordPress with
your CodeIgniter application like it was always there!.