xF1 Add-on [WMTech] External Link Interstitial 1.0.4

Please review this add-on, if you like it. This helps other people to decide and gives us at least a smile back for this work.

Description:
External Link Interstitial is a very small add-on which activates the built-in interstitial screen in XenForo 1.3 to be shown at all external links if you've enabled link proxy.

This has 3 Advantages:
1) Your visitor gets a message that she/he now leaves your site.
2) The referer-log of the target URL does not refer to the actual page with the link at your site any more.
3) It enables Skimlink and similar services to work as intended.

By default the XenForo built-in redirect screen is only shown if an error occurs within the link proxy system (wrong hash or the proxy was not called from your site). Normally the link proxy transparently and silently redirects your visitor to the target URL right after the click.

This add-on changes that behavior and enables the redirect interstitial screen for all external links at your site and still counts the click for the Link Proxy Log in your ACP.

If you want to style the interstitial screen, please refer to the "link_redirect" template which is part of every XenForo installation and can be changed as you like.

There are no options for this add-on. Simply deactivate it, if you no longer want to show the interstitial to all external links.

IMPORTANT:
This add-on only works if you've enabled the "Link Proxy" in XenForo (ACP > Options > Messages > Image and Link Proxy).

Code Quality Guarantee:
We guarantee that our add-ons are coded very carefully and thoughtfully by professional PHP, JS & MySQL programmers. The code is robust and written with performance and reliability in mind. It has been tested extensively before being released and can be used even at large forum installations.
We also guarantee that our add-on does NOT use and does NOT include any callbacks. It does not ever transfer any of your data to a foreign server!

Current compatibility:
This add-on is compatible with XenForo 1.3.x (tested with XenForo 1.3.1), XenForo 1.4.x (tested with 1.4.10) and XenForo 1.5.x (tested with XenForo 1.5.2). Compatible with the new link proxy system introduced in XenForo 1.5.2.
Sorry, this add-on cannot be used at Xenforo 1.2.x or older.
This product is compatible with PHP 7.

Installation/Update:
Detailed Installation / Update Intructions can be found at our support site (direct link). We recommend reading it.


Available Options for admin from Xenforo ACP:
None. Simply deactivate it, if you don't want to use it temporarily.

Instructions and Admin/User-Manual:
We care about our add-ons!
This is why you can find a manual and detailed instructions at our support site
https://wmtech.net/threads/47

Screenshots:
Attached is a screenshot of a default interstitial screen.

ANTI-PIRACY INFO:
This is a WMTech XenForo addon. There has been a lot of care and work done to code it with focus at you, our valued customer. Paying for it respects our work done and enables us to code even more quality software for you. Please respect and protect our intelectual property and DO NOT forward it to any third parties (not even your external developers). We have included digital "fingerprints" into the files of each single package, so we may be able to track a reported abuse of our license back to the licensee. Please help us to fight against piracy and contact us, if you get any knowledge about pirated software or the illegal use or provision of this software.
This add-on (like all of our add-ons) features a license check url which we use to check your site for using a valid license. Licenses for our add-ons are valid only if this check feature works like intended. See our description of the license check process in the License Check Information document at our web site.