patch to disable recaptcha for logged in users and approved commenters

Here’s a patch to disable the captcha for people who are logged in, or who have the correct cookies set from previous approved comments.

As a side effect, this fixes the bug where if you use the admin panel to reply to a comment directly, wp-recaptcha spams it because there was no captcha solved, which shouldn’t happen obviously.

Chris

Edit: cleaned it up a bit

=== modified file 'wp-content/plugins/wp-recaptcha/recaptcha.php'
--- wp-content/plugins/wp-recaptcha/recaptcha.php       2014-11-20 08:52:32 +0000
+++ wp-content/plugins/wp-recaptcha/recaptcha.php       2014-11-22 10:10:53 +0000
@@ -271,8 +271,32 @@
             '"></script>';
     }

+    function disable_recaptcha_for_commenter() {
+       if(is_user_logged_in()) {
+         return true;
+       }
+
+       $commenter = wp_get_current_commenter();
+       $author = $commenter['comment_author'];  // Escaped by sanitize_comment_cookies() in wp-settings.php
+       $email = $commenter['comment_author_email']; // Escaped by sanitize_comment_cookies() in wp-settings.php
+       if ( $author != '' && $email != '' ) {
+         $author = esc_sql($author);
+         $email = esc_sql($email);
+         global $wpdb;
+         $ok_to_comment = $wpdb->get_var("SELECT comment_approved FROM $wpdb->comments WHERE comment_author = '$author' AND comment_author_email = '$email' and comment_approved = '1' LIMIT 1");
+         if($ok_to_comment) {
+           return true;
+         }
+       }
+       return false;
+    }
+
     function show_recaptcha_in_comments() {
         global $user_ID;
+
+       if($this->disable_recaptcha_for_commenter()) {
+         return;
+       }

         //modify the comment form for the reCAPTCHA widget
         add_action('wp_footer', array(&$this, 'save_comment_script'));
@@ -320,7 +344,7 @@
                 $_SERVER['REMOTE_ADDR'],
                 $_POST['g-recaptcha-response']);

-            if (!$response->success) {
+            if (!$this->disable_recaptcha_for_commenter() && !$response->success) {
                 $this->_saved_error = $response->error;
                 add_filter('pre_comment_approved',
                     create_function('$a', 'return \'spam\';'));

https://www.ads-software.com/plugins/wp-recaptcha/