function format_url( $url, $type = '' ){
	$url = preg_replace("`\[.*\]`U","",$url);
	$url = preg_replace('`&(amp;)?#?[a-z0-9]+;`i','-',$url);
	$url = htmlentities($url, ENT_COMPAT);
	$url = preg_replace( "`&([a-z])(acute|uml|circ|grave|ring|cedil|slash|tilde|caron|lig);`i","\\1", $url );
	$url = preg_replace( array("`[^a-z0-9]`i","`[-]+`") , "-", $url);
	$url = ( $url == "" ) ? $type : strtolower(trim($url, '-'));
	return $url;
}