Links

http://www.nickhalstead.com/2007/05/23/php-interview-questions-from-yahoo/
http://booleandreams.wordpress.com/php-mysql-interview-question/
http://booleandreams.wordpress.com/php-mysql-interview-question/php-mysql-interview-questions-2/
http://mycodings.blogspot.com/2008/07/php-mysql-interview-questions.html
http://www.possibility.com/wiki/index.php?title=MySQLInterviewQuestions