/**
* Create current class object (create once).
*
* @return Phpdays
*/
public static function singleton()
{
// create itself only once
if (is_null(self::$_oInstatce)) {
$sClassName = __CLASS__;
self::$_oInstatce = new $sClassName();
}
// return link to itself object
return self::$_oInstatce;
}
