[RESOLVED] Links with multiple varibles

[fr8]

Every time I add a sort option to my directory, all of my links grow by an ifelse statement. So the link code is getting a little out of hand.

Right now I only have three sortable options but have serveral more that I would like to add.

Im looking for a better way to handle the following. Any Ideas?

$date= new : old
$views=most
$rating=top
$channel=can be anything

echo '<ol>
        <li>Sort By ></li>
        <li><a href="sort.php?date='.($date == "new" ? "old" : "new").'&'; if(isset($_GET["channel"])){ echo 'channel='.$_GET["channel"].'&';} if(isset($views)){ echo 'views='.$views.'&';}if(iss    et($rating)){ echo 'rating='.$rating.'';} echo ' ">'.($date == "new" ? "Oldest" : "Newest").'</a></li>
        <li><a href="sort.php?';if(isset($date)){ echo 'date='.$date.'&';}if(isset($_GET["channel"])){ echo 'channel='.$_GET["channel"].'&';} echo 'views=most">Most Views</a></li>
        <li><a href="sort.php?';if(isset($date)){ echo 'date='.$date.'&';}if(isset($_GET["channel"])){ echo 'channel='.$_GET["channel"].'&';}  echo 'rating=top">Top Rated</a></li>
        </ol>
        ';

edit: updated code.

[toxic_brain]

if($_GET["date"] == "new"){
	$date_sort_text = "Oldest";
	$date_sort_param = "old";
}else{
	$date_sort_text = "Newest";
	$date_sort_param = "new";
}
echo "<ol>
        <li>Sort By ></li>
        <li><a href=\"sort.php?" . http_build_query( array_merge($_GET, array("date" => $date_sort_param)) ) . "\">$date_sort_text</a>
		<li><a href=\"sort.php?" . http_build_query( array_merge($_GET, array("views" =>"most"))) . 			"\">Most Views</a>
		<li><a href=\"sort.php?" . http_build_query( array_merge($_GET, array("rating" =>"top"))) .			"\">Top Rated</a>
		</ol>" ;

or you could avoid code duplication by putting a function in place

if($_GET["date"] == "new"){
	$date_sort_text = "Oldest";
	$date_sort_param = "old";
}else{
	$date_sort_text = "Newest";
	$date_sort_param = "new";
}
echo "<ol>
        <li>Sort By ></li>
        <li><a href=\"" . getLink('date', $date_sort_param). "\">$date_sort_text</a>
		<li><a href=\"" . getLink('views', 'most') 		. "\">Most Views</a>
		<li><a href=\"" . getLink('rating', 'top') 		. "\">Top Rated</a>
		</ol>" ;

function getLink($key, $value){
	return 'sort.php?' . http_build_query( array_merge($_GET, array($key => $value)));
}