using CURL or something similar to click on a link

Hi All, I just recently started writing a php script that would get some search results from some other sites and display them. I believe the only php way to do this is using CURL. am I correct?? or is there a more efficient way to do this? Anyways, i got it working fine with curl, except one site where I need to click on a link before doing the search. I can't find a way to click on a link using CURL. is this possible? Thanks in advance, Siavash