CodeIgniter 2.1 issue with show_404() and 404_override

Question

I have been working with CodeIgniter for quite a while now and I\'m currently doing a project for a client that would like a custom 404 pag

Answer 1

I was searching for the same thing, but found quite long solutions like creating own error controller and exception class or simply redirecting to 404 page (which isn't good semantically).

So I did bit research on how CI calls '404_override' route internally. Here's the solution I came up with:

// Override show_404 method
function show_404(){
    // Load Router and Core classes.
    $RTR =& load_class('Router', 'core');

    // Get class and method for 404 from routes.php
    $x = explode('/', $RTR->routes['404_override']);
    $class = $x[0];
    $method = (isset($x[1]) ? $x[1] : 'index');

    // Get current class and method for callback
    $callback_class = $RTR->fetch_class();
    $callback_method = $RTR->fetch_method();
    // Can also log here, using callback class and method.

    // Create object for callback
    $CI = new $callback_class;
    call_user_func_array(array(&$CI, $method), array_slice(array($class,$method), 2));
} // End!

Add this function in system/core/CodeIgniter.php file. This will override show_404 function. You can call it from your controllers and it will call '404_override' route given in routes.php file.