Anti-Captcha (anti-spam botblocker)

Anti-Captcha is a transparent spam solution that does not require any end-user interaction. It is based on a nonce key, which is dynamically inserted using randomly generated (and obfuscated) javascript. The aim of this plugin is to prevent automated attacks (by bots) on the following WordPress actions:

• Posting comments
• Registering for a new account
• Requesting a lost password

When a comment is posted without a valid Anti-Captcha token, it shall be instantly marked as spam. This way, you can always manually approve this comment in hindsight if it appeared to be sincere.

To install simply:

1. Upload the 'anti-captcha' folder to the /wp-content/plugins/ directory
2. 通过WordPress的“插件”菜单激活插件

20141103

• Fixed a tagging mistake causing a "The plugin does not have a valid header" error for new installations
• Added a plugin icon

20140908

• Tested on WordPress version 4.0

20140129

• Fixed a bug that always marked legitimate comments to be moderated

20140128

• Fixed a bug that broke wordpress discussion settings
• Improved code compatibility
• PhantomJs headless browser detection
• Tested on WordPress version 3.8.1

20140102

• Tested on WordPress version 3.8

20130927

• Fixed a bug in which the 'An administrator must always approve the comment' settings was ignored

20130504

• Fixed a bug in which legitimate comments where always flagged for moderation
• Added a check on the format of the supplied mailaddress and it's MX-records (on fail, a comment will be held for moderation instead of being approved)

20130429

• Updated anti-captcha to version 0.3 which introduces a new DOMReady loading method
• This version also prevents a 'alreadyrunflag is not defined' javascript error

20130421

• Tested plugin on WordPress 3.5.1 install, everything works as expected
• Linked to new blog article at http://blog.fili.nl/wordpress-anti-captcha-plugin/
• Version bump to remove WordPress 'Out of date' alert

20110129

• Fixed regression bug that prevented anti-captcha to work on registration and lost-password form

20110125

• Tested on WordPress version 3.0.4
• Removed anti-captcha from login procedure

20100708

• Tested on WordPress version 3.0

20100426

• Changed error message to be more descriptive
• Changed cookie mechanism to not rely on PHP sessions
• Added 'Back/Forward Cache' prevention
• Removed jQuery dependency
• Tested on WordPress version 2.9.2

20090821

• First release