BotDetect PHP CAPTCHA Options: Application Config Settings Code Example

CAPTCHA Code Example Description

This BotDetect Captcha PHP code example shows how to configure Captcha challenges by overriding Captcha library defaults in application configuration files.

BotDetect allows user-defined customization of many Captcha options through a special CaptchaConfig.php file, which should be placed in the same folder as the botdetect.php include used by your PHP forms.

Captcha settings from this configuration file will apply to all Captcha challenges shown on forms including that particular copy of botdetect.php, and will act as defaults with which all Captcha objects will be created. This makes configuration file settings the simplest and most convenient way of Captcha customization for most use cases.

The CaptchaConfig.php file used in this code example contains detailed descriptions and explanations of the many customizable Captcha options exposed by the BotDetect PHP Captcha configuration API.

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.