Fast Template and PHP Varibles

Is anyone here familiar with the FastTemplate class for PHP? If so maybe you can help me. All i want to do is print a PHP varibles value out when my template is phrased. I will give you an example. When I make a form in the action="" part It usually reads action=\"$PHP_SELF\". Now that i have switched to fasttemplate it lookis like this in my template file action="$PHP_SELF". This as I have found does not work. I have tryed assigning the $PHP_SELF in to fast template varible, but that does not work. Any ideas? All Help is greatly appreciated!