paypal :-

PayPal Recurring Payments IPN Samples

PHP Learning :-

Advanced PHP Interview Questions

PHP Basics – PHP Certification Exam Series [1]

How To Optimize Your Site With HTTP Caching

MySql :-

Understanding JOINs in MySQL and Other Relational Databases

JQuery :-

Find the latitude and longitude of address using Geocoding API example

socketo :-

Simple Chat Using WebSocket and PHP Socket

Zend f2 :-

Zend Framework 2 – Simple Web Application – CRUD using Ajax Tutorial