invite my website visitors to share there contacts with us

Hi Freelancers, First of all : I don't want to scrap contacts from a website. I want for every visitor on my own site, that as much as possible of their contacts will be 'scanned' so my website can propose to send invitation to all his contacts. What i look for is php code that is able to : Scans for hotmail contacts (online) Scans for gmail contacts (online) Scans for outlook contacts (on the pc he/she is working from) Scans for OSx (mac) contacts (on the pc he/she is working from) Any other suggestions are welcome. If u have experience with this please send me a PM with following information : What kind of contacts your code can u collect ? (outlook, osx contacs, gmail, hotmail, etc ....) Thank u Steve