reCAPTCHA plugin for WordPress

This is a fork of Shamim Hasan's Advanced noCaptcha & invisible Captcha version 6.1.5. However, it has been almost completly rewritten with these goals in mind:

• PSR-4 compliant.
• Full support for all versions of Google's reCAPTCHA.
• No premium version.

Currently, this plugin is only available here on GitHub. Once installed, however, WordPress will still be able to update it from this repository. This is because in WordPress 5.8 a new plugin header called Update URI was introduced.

Requirements

WordPress >= 5.8 (lower may work just fine, but no support for updating from the repository)

PHP >= 7.1

Features

• Switch between reCAPTCHA versions easily.
  • Each set of keys are tied to the selected version.
  • Custom error message for each version.
• Select the widget's colour theme: Light, Dark or Automatic
  • Automatic will set theme based on the background colour's brightness.
• Choose which request domain to use.
  • google.com
  • recaptcha.net
• Verify origin of solutions, if you've opted not to have Google do it.
• Hide for logged in users.
• Set which language to display the widget in.
• Require that the client's IP address has been determined before submitting data to the reCAPTCHA server.
• Logging.
  • Log reCAPTCHA's JSON response data.
    • Add client's IP address to the data.
  • Debug logging.
    • Have a separate file from WordPress' /wp-content/debug.log.
    • Set a minimum required severity level that messages must have for them to be written to the log.
  • Rotate interval: never, daily, monthly, yearly. Uses UTC/GMT time with a ISO 8601 date format.
  • Specify a directory where to store the log files.

reCAPTCHA versions

v2 "I'm not a robot" Checkbox

• Select size: Normal or Compact or Automatic.
  • Automatic will set size to Compact if screen/area is too narrow for Normal.

v2 Invisible

• Select placement of the widget: Bottom Right, Bottom Left, Inline or Automatic.
  • Automatic will set placement based on a page's text direction. (Left-to-Right: Bottom Right, Right-to-Left: Bottom Left).

v3

• Select placement of the widget: Bottom Right, Bottom Left, Inline or Automatic.
  • Automatic will set placement based on a page's text direction. (Left-to-Right: Bottom Right, Right-to-Left: Bottom Left).
• Load on all pages or just form pages.
• Actions and thresholds for all supported forms.
  • Custom action names.

Forms

• Login.
• Registration. (Only available in a single site installation.)
• Multisite User Signup. (Only available on the main site in a multisite installation.)
• Lost Password.
• Reset Password.
• Comment.

Languages

• English (US, GB).
• Norwegian (bokmål).

Multisite

When network activated in a multisite installation the following happens:

• The plugin's settings will only be available to the Super Admin in the Network Admin.
• In the database the settings will be stored the wp_sitemeta table. This is separate from any sub-sites' settings, which are stored in wp_<siteID>_options.
• Settings set by the Super Admin will apply across all sites.