Postfilters

Template postfilters are PHP functions that your templates are ran through after they are compiled. Postfilters can be either registered or loaded from the plugins directory by using load_filter() function or by setting $autoload_filters variable. Smarty will pass the compiled template code as the first argument, and expect the function to return the result of the processing.

<?php
// put this in your application
function add_header_comment($tpl_source, &$smarty)
{
    return "<?php echo \"<!-- Created by Smarty! -->\n\" ?>\n".$tpl_source;
}

// register the postfilter
$smarty->register_postfilter("add_header_comment");
$smarty->display("index.tpl");
?>

{* compiled Smarty template index.tpl *}
<!-- Created by Smarty! -->
{* rest of template content... *}