将PHP变量传递给Mandrill电子邮件模板

How can I receive and use a PHP variable in Mandrill email template?

$template_content = array(
                          array(
                                'name' => 'link',
                                'content' => $producturl
                                    ),
                            array(
                                'name' => 'facebooklink',
                                'content' =>      'http://www.facebook.com/sharer/sharer.php?u='.$producturl)
                                );

I am passing a variable like this. In the template Product link works fine.

How can I give a link to share on Facebook, I tried as follows but it is not working:

<a href="mc:edit="facebooklink""><img src="Facebooksharebutton.png" /></a>

You can send message variable like below using mandrillapp API

$message = array(
    'merge_vars' => array(array(
        'vars' =>
        array(
            array(
                'name' => 'FACEBOOKLINK',
                'content' => 'http://www.facebook.com')
    ))));

And there in template you have to use *|FACEBOOKLINK| * in href attribute of anchor.