Launch a script belonging to extern web from my php server.

I need to run a small tool in an extern website from my own php code. The web to connect to is a clasified advertisings web. It's a login based web. Once you log in, you can add new items ads, or edit yours. The website gives an id to every ad uploaded. The web provides a renewing service. Once per item, and every 24 hours, you can press on the 'renovar' (renew) button and your item will go again to the top of the searching lists posotion. What I need is a php function that connects to the website via curl or whatever, launch the renew option on a given item and confirm that the renew has been done. function renew($id), in case it's not needed the usr/pass or function renew($id, $user, $password), in case it's impossible to do without login The task should be very easy for someone who knows how to deal this kind of tasks, that it's my guessing they are very standard, but I personaly have not experience enough or time to solve it. So, if you know about this you will solve it very quick. If not, please don't waste your time investigating though probably you will get no more than I did myself before. So, the job should be kind of 90% testing/researching the site behaviour, and 10% code. I need the code working in my server. If you are interested, let me know and I will send you the details. Very important: I don't have many free time to chat or investigate together with the employee, that's why I will send you a doc with the details, so you can take a look before deciding to take the project. If you are awarded, I will send you a ftp access to a folder to develope the code.