Hi!
Thank you for checking out this thread.
I'm working on some killer videos right now that will explain in detail how you can protect your website against hackers. The first part of the video series is live right now and it covers Cross-Site Request Forgery (CSRF). Go ahead and check them out right now: www.aachen-method.com
This knowledge is essential in making your websites secure and once you have a deep understanding of PHP security you can confidently charge higher rates when you are programming for other people.
I have worked hard on making my videos easy to understand and if you watch them in sequence you will have no problem keeping up, even if you are just starting out with PHP programming. You can just copy and paste everything right into your code, it's that simple! The only thing that you might have to change is variable names so that it works with your code and that shouldn't be a problem.
And I have inserted my e-mail address at the end of every video if you happen to have a question, so please don't hesitate to contact me and I'll try to get back to you as soon as I can.
There is no sales pitch anywhere on that website, not even ads! This is because I've been programming PHP since 2001 and since the PHP community has given me so much over the years I now want to give back by providing some killer content. I realize that some people might regard this message as spam, especially because I'm new to this forum. However please understand that I'm just trying to show these videos to as many people as possible so that we as a community can start to eliminate these vulnerabilities from people's PHP code.
Arne
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UPDATE
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I'm excited to say that part 2 of my video series is available. I'm covering Cross-Site Scripting (XSS) and how you can protect your website against it. Over the past couple of weeks I was super busy with my other projects so I couldn't focus on this course, but that's all behind me now and I can work more on this. 
Being able to secure your code against CSRF and XSS attacks is a critical skill in being able to charge higher rates as a freelancer, so don't skip these videos.
I also recorded a new introductory video for you where I talk about how people (read: employers) can't help the perception that expensive equals best. This is supposed to serve as a sneak peek of part 3 of my video series and it's a somewhat simplified version of the reality. I'm not suggesting that you should just start charging $500/hour like a lawyer and half a dozen hot chicks will immediately surround you because they will think you are the s***.
I'm also giving a 100% honest explanation on why I'm giving away all this content. Hint: It's not what you think. Definitely watch this video first.
Make sure you sign up for my newsletter so I can notify you right away when I release more killer videos. I promise I won't give your address to anyone and I will never spam you. You can remove your address from the list at any time simply by clicking on the unsubscribe link that is included in every e-mail.
P.S.: Yeah, I'm posting this on a Wednesday afternoon when I'm supposed to be working. I guess I procrastinate way too much. 
P.P.S.: Here's the link again: www.aachen-method.com