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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.