PHP Version

8.3

CodeIgniter4 Version

4.6.1

CodeIgniter4 Installation Method

Composer (using codeigniter4/appstarter)

Which operating systems have you tested for this bug?

Linux

Which server did you use?

apache

Database

No response

What happened?

I have a codeigniter 4 app that has to live in a shared hosting enviroment and has to be in a subdirectory.
The app has been developed with legacy autorouting enabled.
The app has indexPage as index.php

All the autorouting routes end up throwing a 404 with the "index.php is not a valid controller name" statement.

Steps to Reproduce

1. get an apache webserver
2. set indexPage as index.php in your app/Config/App.php
3. install codeigniter in a subdirectory:

/var/www/html/code-igniger-app
/var/www/html/other-apps-here

this way you'll access the app from http://localhost:8080/code-igniger-app/index.php
4. enable legacy autorouting and create a controller

Expected Output

It should not be throwing a 404

Anything else?

To fix it i added the following code to the very beginning of the index.php

$_SERVER["SCRIPT_NAME"] = str_replace("/public","",$_SERVER["SCRIPT_NAME"]);

The SCRIPT_NAME would have been: /code-igniger-app/public/index.php this way it becomes /code-igniger-app/index.php.
This way when CodeIgniter\HTTP\SiteURIFactory uses the parseRequestURI method to remove the SCRIPT_NAME form the uri and then return the $path it is able to return it correctly.