Need help passing PHP variable through flash MC

Need to get a flash banner to carry through PHP session download. The PHP code is below;

<a href=“<?php echo $_SESSION[‘language’]; ?>&lang=<?php echo $_SESSION[‘language’]; ?>&banner_tag=<?php echo $_SESSION[‘btag’]; ?>”>

The above carries through the affiliate ID together with Site Language which user has come to. The above works fine, what I need to now do is have my flash button call the same function…