WP-reCAPTCHA – 创意绝佳的防Spam的 WordPress 插件

=== Plugin Name === Contributors: BlaenkDenum Donate link: http://www.blaenkdenum.com Tags: comments, registration, recaptcha, antispam, mailhide, captcha, wpmu Requires at least: 2.7 Tested up to: 2.9.1 Stable tag: 3.1.3 Integrates reCAPTCHA anti-spam methods with WordPress including comment, registration, and email spam protection. WPMU Compatible. == Description == = What is reCAPTCHA? = [reCAPTCHA](http://recaptcha.net/ "reCAPTCHA") is an anti-spam method originating from [Carnegie Mellon University](http://www.cmu.edu/index.shtml "Carnegie Mellon University"), then acquired by [Google](http://www.google.com/recaptcha) which uses [CAPTCHAs](http://recaptcha.net/captcha.html "CAPTCHA") in a [genius way](http://recaptcha.net/learnmore.html "How Does it Work? - reCAPTCHA"). Instead of randomly generating useless characters which users grow tired of continuosly typing in, risking the possibility that spammers will eventually write sophisticated spam bots which use [OCR](http://en.wikipedia.org/wiki/Optical_character_recognition "Optical Character Recognition - Wikipedia") libraries to read the characters, reCAPTCHA uses a different approach. The world is in the process of digitizing books by use of automated machines which employ the use of Optical Character Recognition software. Sometimes the certain words cannot be read by the software. reCAPTCHA uses a combination of these words, further distorts them, and then constructs a CAPTCHA image. After a certain percentage of users solve the 'unknown' word the same way, it is assumed that it is the correct spelling of the word. This helps digitize books, giving users a ***reason*** to solve reCAPTCHA forms. Because the industry level scanners and OCR software which are used to digitize the books can't read the words with which the CAPTCHAs are constructed, it is safe to assume that in-house spam-bot OCR techniques will not be able to bypass the resulting CAPTCHA, which is a further distortion of the unreadable word. reCAPTCHA is probably the most popular and widely accepted CAPTCHA systems by both end-users and site-owners. It is used by such sites prominent sites as [Facebook](http://www.facebook.com), [Twitter](http://www.twitter.com), to the Average Joe's little blog out there on the corner of the Internet. It is accessible by everyone. If the user has trouble reading the CAPTCHA challenge, he or she has the option of requesting a new one. If this does not help, there is also an audio challenge which users may use. This plugin is [WordPress MU](http://mu.wordpress.org/) compatible. For more information please view the [plugin page](http://www.blaenkdenum.com/wp-recaptcha/ "WP-reCAPTCHA - Blaenk Denum"). == Installation == To install in regular WordPress and [WordPress MultiSite](http://codex.wordpress.org/Create_A_Network): 1. Upload the `wp-recaptcha` folder to the `/wp-content/plugins/` directory 1. Activate the plugin through the `Plugins` menu in WordPress 1. Get the reCAPTCHA keys [here](http://recaptcha.net/api/getkey?domain=www.blaenkdenum.com&app=wordpress "reCAPTCHA API keys") and/or the MailHide keys [here](http://mailhide.recaptcha.net/apikey "MailHide keys") To install in WordPress MU (Forced Activation/Site-Wide): 1. Upload the `wp-recaptcha` folder to the `/wp-content/mu-plugins` directory 1. **Move** the `wp-recaptcha.php` file out of the `wp-recaptcha` folder so that it is in `/wp-content/mu-plugins` 1. Now you should have `/wp-content/mu-plugins/wp-recaptcha.php` and `/wp-content/mu-plugins/wp-recaptcha/` 1. Go to the administrator menu and then go to **Site Admin > reCAPTCHA** 1. Get the reCAPTCHA keys [here](http://recaptcha.net/api/getkey?domain=www.blaenkdenum.com&app=wordpress "reCAPTCHA API keys") and/or the MailHide keys [here](http://mailhide.recaptcha.net/apikey "MailHide keys") == Requirements == * You need the reCAPTCHA keys [here](http://recaptcha.net/api/getkey?domain=www.blaenkdenum.com&app=wordpress "reCAPTCHA API keys") and/or the MailHide keys [here](http://mailhide.recaptcha.net/apikey "MailHide keys") * If you plan on using MailHide, you will need to have the [mcrypt](http://php.net/mcrypt "mcrypt") PHP module loaded (*Most servers do*) * If you turn on XHTML 1.0 Compliance you and your users will need to have Javascript enabled to see and complete the reCAPTCHA form * Your theme must have a `do_action('comment_form', $post->ID);` call right before the end of your form (*Right before the closing form tag*). Most themes do. == ChangeLog == = Version 3.1.3 = * Added a collision aversion prefix to the Plugin class. bbouton from github alerted me to a collision between WP-reCAPTCHA's plugin class and the JW Player Plugin's Plugin class. = Version 3.1.2 = * Fixed option migration. The plugin was actually written to be made to import the old options, but the hook that functionality was registered to does not fire when the wordpress interface updates a plugin, only when a plugin is updated manually. Now the plugin will import or register default options as long as the options don't already exist. * Fixed a case where recaptcha theme would not change. This happened because of the above problem, creating a situation in which the tab index field could be empty, and being empty this then caused a problem with the recaptcha options when they were output to the page. If you're running version 3.0 of the plugin, go ahead and add a number to the tab index (e.g. 5 for comments, 30 for registration), if not, this plugin should automatically fix it next time you change save the settings. * Modified the options page submit buttons to more explicitly show that they are specific to their own respective sections, that is, one button ONLY saves the changes for one reCAPTCHA, and the other ONLY saves the changes for MailHide. = Version 3.0 = * Rewrote the entire plugin in an object-oriented manner with separation of concerns in mind to increase maintainability and extensibility * Implemented the ability to import the options from the option set of older versions of the plugin, such as 2.9.8.2 and less * Redesigned the options page for the plugin, now using newer wordpress options/form functionality with support for input-validation * Options for recaptcha and mailhide are independent of each other * Added support for localization, using gettext * Fixed the issue where comments would not be saved if the reCAPTCHA was entered incorrectly (or not entered at all). requires javascript * Fixed an issue where saved comments (from bad reCAPTCHA response) would replace double quotes with backslashes * Fixed an issue in wordpress 3 and above in which mailhide would not work due to interference with a new filter, make_clickable, which auto-links emails and URLs * Fixed a role-check issue in wordpress 3 and above. level_10 (and all levels for that matter) have been deprecated. now using activate_plugins instead. = Version 2.9.8.2 = * Fixed a bug with WordPress 3.0 Multi-Site = Version 2.9.8 = * Added support for WordPress 3.0 Multi-Site thanks to Tom Lynch = Version 2.9.7 = * Fixed a relatively new [critical bug](http://www.blaenkdenum.com/2010/03/recaptcha-marking-all-comments-as-spam/) which marked new comments as spam regardless of reCAPTCHA response = Version 2.9.6 = * Fixed a careless bug affecting custom hidden emails * Fixed broken links in readme.txt = Version 2.9.5 = * Added flexibility to the enabling of MailHide. Can now separately choose to enable/disable MailHide for posts/pages, comments, RSS feed of posts/pages, and RSS feed of comments * Fixed an ['endless redirection' bug](http://wordpress.org/support/topic/245154?replies=1 "endless redirection in wp-reCAPTCHA options form") thanks to Edilton Siqueira * Fixed a bug in WPMU where wp-admin/user-new.php kept trying to validate the user registration with reCAPTCHA information despite not having shown the reCAPTCHA form, thanks to [Daniel Collis-Puro](http://blogs.law.harvard.edu/ "Weblogs at Harvard Law School") for lett