WordPress Plugin: Subscribe to Comments 2.0.4

Subscribe to Comments 2 is a WordPress plugin that allows commenters on an entry to subscribe to e-mail notifications for subsequent comments. It does NOT e-mail you new blog posts. For that functionality, use Skippy's Subscribe2 plugin.

New Features

Rudimentary security
- Users can no longer just enter a random e-mail into the subscription manager and modify someone else’s subscriptions
- In order to modify subscriptions, users need to use a special link, given in notification e-mails, and printed in the comments form as long as they have their comment cookie
Recognition of subscription status
- Unsubscribed users see the “subscribe to comments” checkbox, but subscribed users see a “Manage your subscriptions” link
- The author of the post is recognized by either login or comment cookie and is assumed to be subscribed to the entry (as they will receive notifications through WordPress)
Vastly improved subscription manager
- Uses visual style of WordPress interface
- Can be optionally accessed via “Manage” menu in WordPress for level 8+ users
- E-mail verification of block requests
- Javascript “invert selection” link to check/uncheck subscriptions for mass deletion
- “Return to the page you were viewing” link that persists at the top of the page, so that users can easily return to the post they were reading once they are done modifying subscriptions
Ability to let users change notification e-mail address
- In the subscription manager, users can request that their notification address be changed for all their subscriptions
- Special link is sent to the old address for verification
- Once clicked, their e-mail address will be changed instantly for all their comments
Easy integration into comments form
- No modification of comments form needed for WP 1.5+ (supported themes)
- For users who want custom placement of the checkbox/link to subscription manager, this can be done with one simple function call, placed anywhere in the comment form
Subscription without leaving a comment
- By popular demand, you can now offer visitors the option of subscribing to comments on an entry without having to leave a comment themselves
- If the reader later decides to join the conversation, their subscription continues without them having to explicitly set it
Customization
- You can make the Subscription Manager that your users see use your theme’s header, footer and sidebar, using CSS to style it to fit your site
Internationalization
- I’ve written Subscribe to Comments 2.0 with i18n in mind, making full use of __() and _e() functions. The domain is “subscribe-to-comments”. Translators should upload their .mo to this plugin’s wiki page.

How to implement:

Download Subscribe to Comments v2.0.4

Unzip and upload subscribe-to-comments.php into your wp-content/plugins/ folder.

Copy wp-subscription-manager.php into your blog's root WordPress directory (the directory where wp-config.php resides)

Go to the admin interface and activate the plugin.

If your WordPress 1.5 theme doesn't have the comment_form hook, or if you would like to manually determine where in your comments form the subscribe checkbox appears, enter this where you would like it:
<?php show_subscription_checkbox(); ?>

If you would like to enable users to subscribe to comments without having to leave a comment, place this somewhere in your template, but make sure it is <strong>outside the comments form</strong>. A good place would be right after the ending </form> tag for the comments form:
<?php show_manual_subscription_form(); ?>

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WordPress Plugin: Subscribe to Comments 2.0.4