Prefilters
Template prefilters are PHP functions that your templates are ran through
before they are compiled. This is good for preprocessing your templates
to remove unwanted comments, keeping an eye on what people are putting
in their templates, etc.
Prefilters can be either registered or loaded from
the plugins directory
by using load_filter() function or by setting
the $autoload_filters
variable.
Smarty will pass the template source code as the first argument, and
expect the function to return the resulting template source code.
Example 15-2. using a template prefilter
This will remove all the comments in the template source.
<?php
// put this in your application
function remove_dw_comments($tpl_source, &$smarty)
{
return preg_replace("/<!--#.*-->/U",'',$tpl_source);
}
// register the prefilter
$smarty->register_prefilter('remove_dw_comments');
$smarty->display('index.tpl');
?>
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See also register_prefilter(),
postfilters
and
load_filter()
