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With Like2Reveal, you may easy add a floating content-blocker into any PHP-based web page, any Wordpress theme (or all themes), any Joomla template (or all templates), any other PHP-based platforms: phpBB, Drupal, SMF, Opencart, Magento, Zencart, vBulletin, Xenforo, … with just 1 include statement.
With Like2Reveal for WordPress (plugin), you may easily control which pages you'll want to block
Like2Reveal for WordPress (Facebook Like to Reveal Content) has many PROS
Changelog
10/06/2014 - v1.0.0 - first release