Walkthrough: Simple anti-robot captcha with PHP
This post was featured on the PHP Weekly newsletter, Aug. 8, 2013. On my website, I decided to implement my own anti-robot captcha system for two reasons: 1) I wanted to keep the website code vanilla and 2) I disliked the CAPTCHAs provided by other services that either made you type in Chinese or that didn’t visually integrate well with …