I recently had to add captcha to one of my web contact forms as I was receiving a lot of spam from it. I went for a simple math captcha as I think it is easier to understand than Googles reCaptcha. Since the implementation turned out to be much easier than expected, I thought I’d […]
Add Math Captcha Spam Protection to your Contact Form
![Code](https://blog.daniel-klose.com/wp-content/uploads/2014/05/code-270x270.jpg)