Ticket #10931: wp-comments-post.php.diff

wp-comments-post.php

@@ -73 +73 @@
 if ( '' == $comment_content )
         wp_die( __('Error: please type a comment.') );
 
+if ( $wpdb->get_var("SELECT COUNT(*) FROM $wpdb->users WHERE user_email = '$comment_author_email'") )
+        wp_die( __('Error: please login before posting a comment.') );
+
 $comment_parent = isset($_POST['comment_parent']) ? absint($_POST['comment_parent']) : 0;
 
 $commentdata = compact('comment_post_ID', 'comment_author', 'comment_author_email', 'comment_author_url', 'comment_content', 'comment_type', 'comment_parent', 'user_ID');