I'm looking for PHP script to detect which version of MS Outlook that is use to open the email. The script will be embedded via image source link. It should be a really small script but it's much harder than it sounds. I hired a freelance prior to this post but he couldn't complete. So please make sure that you know how before bidding. I will only pay after I have tested the script to be working correctly and give the correct result. Sorry, had a very very bad experience with the previous freelance from another freelance web.
** EDIT **
I chose the wrong budget range, actually my budget is lower than 100 USD