Ich zitiere hier einfach mal:
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.
Der Artikel ist lang und interesant. Und als PHP dev sollte man so was wissen.
I have always felt that it’s easy to write code in PHP, and even easier to write bad code in PHP. The proliferation of PHP on the web has really been helped out by its use in popular open-source software packages like WordPress, Drupal, and Magento as well as major web applications like Facebook; with PHP being used in so many varied instances (dynamic websites, in-depth web applications, blogging platforms, content management systems, and e-commerce being only a subset of the many applications of PHP) the opportunities for dirty data and insecure systems are numerous. This tutorial will explain some methods of Getting Clean With PHP: Data Sanitization and Validation by focusing on several different forms of data inputs and how to use PHP filters and custom functions.