BotDetect PHP CAPTCHA Basic Sample

PHP CAPTCHA validation
CAPTCHA
Change the CAPTCHA codeSpeak the CAPTCHA code
 

Description

This sample project shows the most basic source code required to protect an PHP form with BotDetect CAPTCHA and validate the user input.

It can be used as a starting point when you are first learning how to use BotDetect.

Free Version Limitations

  • The free version of BotDetect includes a randomized BotDetect™ trademark in the background of 50% of all Captcha images generated.
  • It also has limited sound functionality, replacing the CAPTCHA sound with "SOUND DEMO" for randomly selected 50% of all CAPTCHA codes.
  • Lastly, the bottom 10 px of the CAPTCHA image are reserved for a link to the BotDetect website.

These limitations are removed if you upgrade your BotDetect license.