ASP.NET web control in PHP?

Dear All, I've a few months of experience in PHP programming. I'd like to know whether PHP has anything similar to the web control in ASP.NET? I found that ASP.NET is really handy when creating GUI for web applications. The web controls are quite easy to use and I like the DataGrid in ASP.NET a lot. I wonder whether there's any opensource project using PHP to build reusable GUI widgets for HTML pages? Thank you very much for your help. Yours, Bill