Davey Shafik has posted a Filtering and Escaping Cheat Sheet for PHP.

It’s a neat, one page cheat sheet, with the filtering/escaping basics laid out and organised. I won’t say it will make you a security expert in a day (it’s a cheat sheet afterall!) but it will remind you of the needed functions at least…

Related posts:

  1. Escaping in ADOdb; does it exist?
  2. PHP Input Filtering (the Q-Site Q_InputFilter Class)