(PHP 5 >= 5.1.2)
spl_autoload — Default implementation for __autoload()
This function is intended to be used as a default implementation for __autoload(). If nothing else is specified and autoload_register() is called without any parameters then this functions will be used for any later call to __autoload().
By default it checks all include paths to contain filenames built up by the lowercase class name appended by the filename extensions .inc and .php.
No value is returned.