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I tried to do this for you by editing files on my wfsection module and I couldn't figure out exactly how to call the authors to show up when you click sort by. I was able to get sort by authors as an option on the page but when you click on the arrows to sort it, it won't bring it up in that order.
Hopefully someone else can figure out what code to use.
It's the index.php file in the wfsection root folder. Here is the first option's code.
echo "
" . _WFS_SORTBY1 . " ";
echo " " . _WFS_TITLE1 . " (
)";
To add the author, you have to add it like it is written above but have _WFS_AUTHER1 instead of the title1 and order by (I think) authorA and below that authorD. You have to add define("_WFS_AUTHER1","Author"); into the language/yourlanguage/main.php file.
This gets the new option in the page but when you click on sort by author up/down arrows, it won't sort it by author.
So there must be another step or two that needs to be done in order to get it to work. Maybe it's the name author that needs to be changed to something else or it could be another file that needs to be edited.
