PHP Tutorials — Security

One crucial part of PHP development practice is always keeping in mind that security is not something you can simply buy off the shelf at your local convenient store. Ensuring the security of your web applications is a process, which over time, needs to be constantly evaluated, monitored, and hardened.

Data security is important and often undervalued by designers, developers, and clients alike. Since PHP 5.2.0, data sanitization and validation has been made significantly easier with the introduction of data filtering. Today, we're going to take a closer look at these filters, how to use them, and build a few custom functions.

In this article i will cover 5 important steps you need to take to make sure your web site’s secure.

This tutorial discusses methods to combat spam bot attacks and keep your site clean and safe.

An upload script with extensions validation trough mime types! May come in handy next time you start a PHP project where you only want people to upload images!

Learn to sanitize input sent to your web application by recursively applying a white list to your global variables.

Build Your Own Captcha and Contact Form

Secure Your Forms with Form Keys

Creating an Advanced Password Recovery Utility

This tutorial will show you how you can easily yet effectively protect your website and database against SQL injections and to secure user inputs.