How NOT to Autoload in PHP

public static function includeDirectory($dir){
    foreach (scandir($dir) as $entry){
        if($entry == "." or $entry == "..")
            continue;
        // Recursively run functions on subdirectories.
        elseif(is_dir("$dir/$entry"))
            self::includeDirectory("$dir/$entry");
        // Include .php files.
        elseif(strrchr($entry, ".") == ".php")
            include_once "$dir/$entry";
    }
}