Add link to call by Skype in a message - relative reference I have rules' module and in the last part I set an action to show a message. In that message I want to add a link to call one user by Skype, I am using this:

     $message = "&lt;a href='skype:echo123?call'&gt;Click to call to your student&lt;/a&gt;";

     echo $message;


That only works in php (You can try it http://phptester.net/).

But the problem is that Drupal is using that reference as a relative url so when I click it, it takes me to "http://www.example.com/yyyy/echo123?call". How can I do to do a reference to Skype?.

Thank you so much for your help.
your link contains "skype" protocol that is filtered out by filter_xss_bad_protocol() Drupal core function.
You can install Filter Protocols module which allows you to configure allowed protocols. Skype protocol is not included in configuration by default, you'll have to add it yourself - then your skype link will work.