Custom classes in CodeIgniter

Question

Seems like this is a very common problem for beginners with CodeIgniter, but none of the solutions I\'ve found so far seems very relevant to my problem. Like the topic says I\'m

Answer 1

Codeigniter has a common function to instantiate individual classes.

It is called load_class(), found in /system/core/Common.php

The function;

/**
* Class registry
*
* This function acts as a singleton.  If the requested class does not
* exist it is instantiated and set to a static variable.  If it has
* previously been instantiated the variable is returned.
*
* @access   public
* @param    string  the class name being requested
* @param    string  the directory where the class should be found
* @param    string  the class name prefix
* @return   object
*/

The signature is

load_class($class, $directory = 'libraries', $prefix = 'CI_')

An example of it being used is when you call the show_404() function.