public static function FILTER_SANITIZE_PERSON_NAME($value)
	{
		$value = preg_replace('/\s+/', ' ', $value);			// no multiple spaces,
		$value = mb_strtoupper($value,'UTF-8');					// move to upper (preserving accents)
		$value = trim($value); 									// no trailing and ending blancs
		
		return $value?:null;									// multibyte uppercase
	}