This plugin currently is under heavy development

As I'm currently reworking the whole core, here's the late Alpha or early Beta. Please note that this release is moving towards a Beta and then RC candidate, but in the meantime features might get added or dropped. Only the core functionality is somewhat safe to use. Please use with caution and if you find a strange behavior, please take yourself a minute and report a bug. Software development takes two sides: The devloper and the user. Want to become a user? Give it a test drive.

If you like it and want to tell me, drop a mail or just open an issue. Or buy me a beer!

As you're already thinking about giving this a test run: If you find a feature, just add your request as issue as well. I'll consider and discuss everything down the road.

Plugin Name

Plugin Name: Internal Link Checker
Plugin URI: http://unserkaiser.com/plugins/internal-link-checker/
Author: Franz Josef Kaiser, Patrick Matsumura, Rodolfo Buaiz
Author URI: http://unserkaiser.com/
Tags: admin, link, links, meta, box, meta_box, missing, blogroll, broken, maintenance, posts, 404
Requires at least: 3.0
Tested up to: 3.8
Stable tag: 0.6

Description

Internal Link Checker

Adds a meta box to the post edit screen that shows all internal links from other posts to the currently displayed post. The plugin works out of the box.

Installation

No explanation needed - works out of the box. Just activate and be safe.

Frequently Asked Questions

How-to

The old meta box content filter from pre 1.0 versions won't work anymore. Updates & How-Tos will follow here. Or on a dedicated wiki page on this repo.

Languages

Translation ready. If you want to help translating, please contact me on G+.

Included: EN/DE (Patrick Matsumura) EN/DE & EN/ES (Rodolfo Buiaz)

Screenshots

meta box in post edit admin UI screen

Changelog

v1.0.0

Start complete rework.

Everything as much OOP as possible with WP Italian food style code.

Switched License to MIT. Less headaches.
v0.6.2

Reformatted code styling to prepare rewrite
v0.6.1

Shortened admin table class
v0.6

Major improvements in code length
v0.5.4

Empty posts fix
v0.5.3 Code styling
v0.5.2

Prepare SQL
v0.5.1

Separate textdomain function
v0.5

Now supports sorting by column
v0.4

Now supports pagination for the meta box to take less space in the UI in cases where there are more than just a few links
v0.3

Final stable release with new WP Admin Tables class API in use. Typo & Language fixes, fully translated
v0.2.9

Check for remote readme file availibility before get file contents on update

The meta box content filter disappeared and was replaced by an action to override the content
v0.2.8

Added better update messages for plugin list screen
v0.2.7.1

Moved to admin edit post permalinks
v0.2.7

Added native WP admin UI table to the meta box
v0.2.6.6

Moved Text Domain to plugin header comment for easier maintainance and transparency
v0.2.6.5

Added wrapper function to call plugin data
v0.2.6.4

Changed meta box title to "Internal Links" to not have long titles in screen options tab
v0.2.6.3

Added mu-plugins directory for l10n lang files loading
v0.2.6.2

Avoids loading on every $_REQUEST. Now only loads on post.php in admin (post/page/cpt new/edit) screens
v0.2.6.1

Reworked translation files
v0.2.6

Added singular/plural translation strings

Grouped results by post type column
v0.2.5

Added auto-correction for li elements & container
v0.2.4

Added MarkUp & MarkUp filter functions that work based on an initial settings array
v0.2.2

Added authors file

Made links unique and minor fixes
v0.2.1

Minor fixes

Added translation props Patrick Matsumura
v0.2

Moved to class to clean up global namespace

Added next step for translations
v0.1.3

Added screenshot, readme.txt for wp.org repo & fixed not echoing if there are no links
v0.1.2

Meta box content now displays inside an unordered list
v0.1.1

Should now work with post titles & post slugs/names
v0.1

First version

Can now be easier extended or used on front