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Advanced PHP Tutorial: 7 Useful functions to tighten the security in PHP

Note: This article was originally published at PHPDeveloper on 9 October 2010.
PHPDeveloper

On the Advanced PHP Tutorial site there's a recent post that suggests a few useful functions that can get you started on security and protecting your application from possible exploits. These aren't the only way to prevent these issues, but they're a start in the right direction.

Security is a very important aspect of programming. In PHP, there are few useful functions which is very handy for preventing your website from various attacks like SQL Injection Attack, XSS attack etc.Let's check few useful functions available in PHP to tighten the security in your project. But note that this is not a complete list, it just list of functions which I found useful for using in your project.

The functions include mysql_real_escape_string for database query handling, htmlentities to filter user input for HTML and two hashing functions to create hashes you can validate from - md5 and sha1.