Plugin for YOURLS 1.5+. Tested on YOURLS 1.8.1

1. Add the character '~' to a short URL to display a preview page with QR code and Thumbnail image before redirection.
2. On clicking a shortlink, land on a preview page, and wait for N seconds before auto redirection.
3. You can find a preview button , at the admin area.

The following plugins should already be installed and activated:

1. YOURLS QRCode or Google Chart API QR Code Plugin. If not found, an QR NOT FOUND image is displayed`
2. Thumbnail URL image. If not found Preview Not Found image is displayed.
3. If you have the plugin 404 If Not Found activate, please remeber to edit the plugin file and add all functions which are triggered in other plugins as loader_failed. An example of the same is:

...
yourls_add_action('redirect_keyword_not_found', 'ozh_404_if_not_found');

// 'keyword+' provided but this isnt an existing stat page
yourls_add_action('infos_keyword_not_found', 'ozh_404_if_not_found');

// 'keyword' not provided: direct attempt at http://sho.rt/yourls-go.php or -infos.php
yourls_add_action('redirect_no_keyword', 'ozh_404_if_not_found');
yourls_add_action('infos_no_keyword', 'ozh_404_if_not_found');

// Display a default 404 not found page
function ozh_404_if_not_found($request) {
   // The QR Code generator, .qr.
	if(function_exists('sean_yourls_qrcode'))
		sean_yourls_qrcode( $request );
   // Our plugin with tidle (~) character.
	if(function_exists('formula21_preview_loader_failed'))
		formula21_preview_loader_failed($request);
    yourls_status_header(404);
    ...
}

1. In /user/plugins, create a new folder named preview-url-with-qrcode-thumbnail.
2. Drop these files in that directory.
3. Go to /user/config.php and add:
   • define('PRE_REDIRECT_PREVIEW', true); to activate the preview before redirect plugin.
   • define('PRE_REDIRECT_SECONDS', 10); to define the number of seconds before auto-redirection. Recommended 8 to 10 seconds.
   • These features are optional.
   • The plugin is so made to replace with the long url if Javascript is active. If not, the plugin yet works and will redirect with something called a Refresh header.
4. Go to the Plugins administration page ( eg http://sho.rt/admin/plugins.php ) and activate the plugin.
5. Have fun!

This plugin already translated to English and Russian, simply uses whatever language YOURLS uses, as described here.

If you want to translate this plugin into your own language, this blog post from YOURLS describes how to do it. You can find the latest .pot file in the languages folder of the plugin directory. Please follow the contributing guidelines below to add your translation to plugin.

MIT License