public static function getGlobalValue($name)
    {
        return array_key_exists($name, self::$globalValues) ? self::$globalValues[$name] : null;
    }
public static function getGlobalValue($name)
    {
        return array_key_exists($name, self::$globalValues) ? self::$globalValues[$name] : null;
    }
public static function getGlobalValue ( $ name ) { return array_key_exists ( $ name , self :: $ globalValues ) ? self :: $ globalValues [ $ name ] : null ; }
Get global substitution value

@param string $name
@return null|mixed  Null will be returned if value not set
Get global substitution value