Sometimes when trying to pass characters in a CodeIgniter url it causes the error - 'The URI you submitted has disallowed characters.' Here is my fix.

This is a short snippet of php code if you want to use a CodeIgniter database query inside a helper file/function: application/helpers/. Very easy to use.

Are you wondering if it's a steep learning curve for CodeIgniter... I suspect It's probably very similar to what you already coding in php classes.