Information Security Stack Exchange is a question and answer site for information security professionals. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I've got legacy PHP code which attempts to prevent script/SQL injection with the following:

if (!empty($_POST)) {
    while (list($k,$v)=each($_POST)) {

            if (!get_magic_quotes_gpc())


The same is exactly replicated for $_GET as well.

Is this enough to prevent script/SQL injection?

share|improve this question

No. It's blacklist-based, it tries to take care of specific tricks involving html entities. It doesn't even require magic_quotes, and magic_quotes has been deprecated as inadequate. Chris Shiflett is just one of many who've written a blog post explaining how vulnerable that is; it won't even stop modern automated script-kiddie attacks.

Use prepared statements in the database, and you'll be most of the way there--although even prepared statements aren't foolproof.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.