jeanloui

the_permalink() into the loop (e.g. archive.php of any theme) gives something like this:

http://example.com/?p=124

If I need to “insert” extra variables after the ID, e.g.:
http://example.com/?p=124&mycategory=3&myclient=john
I use this:

$myurl = get_post($post, ARRAY_N);

// this gives a numeric array of the class object, where $myurl[0] contains the ID of the post, even if we don’t know if it is a “post” or a “page”, but all my items are “posts”… and maybe $myurl[20] defines if it is a post or a page…

Then I write manually the new url:

<a href="?p=<? echo $myurl[0]; ?>&mycategory=<? echo $mycategory ?>&myclient=<? echo $myclient ?>">New URL</a>

Note that after the <a href, there is only the question mark.

hope this helps