PHP Interview questions

http://vijaymodi.wordpress.com/2008/01/25/php-interview-questions-and-answers/

PHP Basics
http://www.sandykadam.com/programming-stuff/php/php-basic-interview-questions/

PHP Snippets

http://phpmaster.com/5-inspiring-and-useful-php-snippets/?utm_medium=email&utm_campaign=Five+Creative+PHP+Snippets+XML+Wizardry+with+XPath+and+Manage+Your+Class+Dependencies&utm_content=Five+Creative+PHP+Snippets+XML+Wizardry+with+XPath+and+Manage+Your+Class+Dependencies+CID_9891ebab597beaca64e251bc7ed155ed&utm_source=Newsletter&utm_term=5+Inspiring+and+Useful+PHP+Snippets

PHP Security

http://phplens.com/lens/php-book/optimizing-debugging-php.php

Securing PHP Files using HTTP Authentication

http://www.techgig.com/skillpage/PHP/Securing-PHP-Files-using-HTTP-Authentication/655?utm_source=Mailer&utm_medium=TG_batch&utm_campaign=skill_daily_2012-06-26&email=smartganeshu@gmail.com&tid=6690860&activity_name=tg_PHP_daily2012-06-26&dt=20120626&auth_token=c21hcnRnYW5lc2h1OTI2NzQ6OjEzNDA2OTYwMzcxMjA5NjAwMDAwOlRH

Tips for Optimizing PHP code

http://www.techgig.com/skillpage/PHP/43-Tips-for-Optimizing-PHP-code/653?utm_source=Mailer&utm_medium=TG_batch&utm_campaign=skill_daily_2012-06-26&email=smartganeshu@gmail.com&tid=6690860&activity_name=tg_PHP_daily2012-06-26&dt=20120626&auth_token=c21hcnRnYW5lc2h1OTI2NzQ6OjEzNDA2OTYwMzcxMjA5NjAwMDAwOlRH