void register_postfilter ( mixed function)
Use this to dynamically register postfilters to run templates
through after they are compiled. See template postfilters for
more information on how to setup a postfiltering function.
The php-function callback function can be either (a) a string
containing the function name or (b) an array of the form
array(&$object, $method) with
&$object being a reference to an
object and $method being a string
containing the mehod-name or (c) an array of the form
array(&$class, $method) with
$class being a classname and
$method being a class method of that
class.
