317 行目system/core/CodeIgniter.php
から 360 行目 (CodeIgniter 2.1.0) にあります。
/*
* ------------------------------------------------------
* Call the requested method
* ------------------------------------------------------
*/
// Is there a "remap" function? If so, we call it instead
if (method_exists($CI, '_remap'))
{
$CI->_remap($method, array_slice($URI->rsegments, 2));
}
else
{
// is_callable() returns TRUE on some versions of PHP 5 for private and protected
// methods, so we'll use this workaround for consistent behavior
if ( ! in_array(strtolower($method), array_map('strtolower', get_class_methods($CI))))
{
// Check and see if we are using a 404 override and use it.
if ( ! empty($RTR->routes['404_override']))
{
$x = explode('/', $RTR->routes['404_override']);
$class = $x[0];
$method = (isset($x[1]) ? $x[1] : 'index');
if ( ! class_exists($class))
{
if ( ! file_exists(APPPATH.'controllers/'.$class.'.php'))
{
show_404("{$class}/{$method}");
}
include_once(APPPATH.'controllers/'.$class.'.php');
unset($CI);
$CI = new $class();
}
}
else
{
show_404("{$class}/{$method}");
}
}
// Call the requested method.
// Any URI segments present (besides the class/function) will be passed to the method for convenience
call_user_func_array(array(&$CI, $method), array_slice($URI->rsegments, 2));
}
しかし、あなたがやろうとしていることはまだ意味がありません。