BotDetect PHP CAPTCHA Validation:
PHP jQuery AJAX Contact Form CAPTCHA Code Example

Contact Form

Retype the CAPTCHA code from the image
Change the CAPTCHA code

CAPTCHA Code Example Description

This BotDetect Captcha PHP code example demonstrates the use of BotDetect Captcha in a scenario using jQuery and AJAX to validate individual form fields against a PHP server backend. The approach in this scenario is useful in situations where duplication of server-side validation routines on the client side is impractical.

Free Version Limitations

  • The free version of BotDetect only includes a limited subset of the available CAPTCHA image styles and CAPTCHA sound styles.
  • 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.

BotDetect PHP Captcha Library version 4.1.0 Free loaded by PHP version 7.2.34-38+ubuntu18.04.1+deb.sury.org+1