What security issues should I look out for in PHP

Question

I just starting out learning PHP, I\'ve been developing web apps in ASP.Net for a long time. I was wondering if there are any PHP specific security mistakes that I should be

Answer 1

Most of the security issues related to PHP come from using unparsed "outside" (GET/POST/COOKIE) variables. People put that kind of data directly into file paths or sql queries, resulting in file leakage or sql injections.