class_Autoloader.php

<?php
class Autoloader {

    public static $prefix = NULL;

    public static function register($path, $prefix = 'class_')
    {
        self::$prefix = $prefix;
        if (is_dir($path))
            set_include_path($path . PATH_SEPARATOR . get_include_path());

        spl_autoload_extensions('.php');
        spl_autoload_register(array(__CLASS__, 'loadClass'));
    }

    public static function findClassPath($class_name, $extension = NULL, $prefix = 'class_')
    {
        $include_path = explode(PATH_SEPARATOR, get_include_path());

        foreach ($include_path as $inc_path)
        {
            if (file_exists($inc_path.DIRECTORY_SEPARATOR.$prefix.$class_name.$extension))
            {
                return $prefix.$class_name.$extension;
            }
        }

        return false;
    }

    public static function loadClass($class_name)
    {
        $class_path = explode('\\',$class_name);
        $class_name = end($class_path);

        $extensions = array_map('trim',explode(',',spl_autoload_extensions()));
        $include_path = get_include_path();

        foreach ($extensions as $extension)
        {
            if (false !== ($class_path = self::findClassPath($class_name, $extension, self::$prefix)))
            {
                require $class_path;
                break;
            }
        }

    }

}

//kullanimi şu şekilde yaptım
Autoloader::register(INTERFACE_CLASS_DIR);
Autoloader::register(INTERFACE_CLASS_DIR.'/core/');