在php中从google，yahoo和AOL导入用户联系人

我整周都在互联网上进行搜索，但是找不到像主要邮件帐户一样从Google，Yahoo和AOL导入用户联系人的良好资源.实际上，我期望php实现能够做到这一点.当我搜索时，发现有人建议使用第三方应用程序.但是在这里，我正在寻找自己的应用程序供导入用户联系簿使用.请任何人可以帮助我做到这一点，或者给我一些想法.

I search through the internet around whole week but could not find a good resources to import user contacts form google, yahoo, and AOL like main mail accounts. Actually I am expecting a php implementation to do this. when I search I found some people have suggested third party app. But here I am looking for some my own app for import users contact book. Please any one can help me to do this or give me some idea to that.