Add paypal to website.

I need someone to integrate a paypal processing service to a website (donations giving). ## Deliverables Website it done using Yii (PHP MCV) framework (near finished condition for first release). At a certain page, a list of possible donations is listed for site visitors, loaded from mysql database. Donations models (amount, quantity, currency, description, etc...) are made by project owners. I need following functionality: When visitor sees a donation he likes, he clicks a link and website processes his paypal payment/donation. If successful transfer, certain data is recorded in website database: user (username) who gave the donation, what donation (name and amount, ID of donation) and to whom (receiver of donation - project owner, his username). You don't have to implement this functionality using Yii framework, you can use plain PHP if you prefer. Yii is preferred. It would be nice if this functionality can be achieved without leaving the website during process, without going to paypal processing pages. This implementation should be easy for a person who knows how to do it. Please state expected project duration, and provide examples if you find them appropriate. I can be online skype to provide detailed explanations - if needed, during project implementation. Primary selection criteria - lowest price. Secondary selection criteria - shortest implementation period. Please feel free to ask questions. I'm sure i forgot to mention something.