registerFilter() — dynamically register filters
void registerFilter(string type,
mixed callback);Use this to dynamically register filters to operate on a templates. It uses the following parameters:
type defines the type of the filter. Valid values are "pre", "post", "output" and "variable".
callback defines the PHP callback. it can be either:
A string containing the function name
An array of the form array(&$object, $method) with
&$object being a reference to an
object and $method being a string
containing the method-name
An array of the form
array($class, $method) with
$class being the class name and
$method being a method of the class.
If the chosen function callback is of the form
array(&$object, $method), only one instance of the
same class and with the same $method can be registered. The
latest registered function callback will be used in
such a scenario.
A prefilter runs through the template source before it gets compiled. See template prefilters for more information on how to setup a prefiltering function.
A postfilter runs through the template code after it was compiled to PHP. See template postfilters for more information on how to setup a postfiltering function.
A outputfilter operates on a template's output before it is displayed. See template output filters for more information on how to set up an output filter function.
See also
unregisterFilter(),
loadFilter(),
$autoload_filters,
template pre filters
template post filters
template output filters
section.