compile_output_filter example

$output = "{$function}({$output},\$_smarty_tpl)";
                        } else if (is_object($function[0])) {
                            $output = "\$_smarty_tpl->smarty->registered_filters[Smarty::FILTER_VARIABLE][{$key}][0]->{$function[1]}({$output},\$_smarty_tpl)";
                        } else {
                            $output = "{$function[0]}::{$function[1]}({$output},\$_smarty_tpl)";
                        }
                    }
                }
                // auto loaded filters                 if (isset($compiler->smarty->autoload_filters[Smarty::FILTER_VARIABLE])) {
                    foreach ((array)$compiler->template->smarty->autoload_filters[Smarty::FILTER_VARIABLE] as $name) {
                        $result = $this->compile_output_filter($compiler, $name, $output);
                        if ($result !== false) {
                            $output = $result;
                        } else {
                            // not found, throw exception                             throw new SmartyException("Unable to load filter '{$name}'");
                        }
                    }
                }
                if (isset($compiler->template->variable_filters)) {
                    foreach ($compiler->template->variable_filters as $filter) {
                        if (count($filter) == 1 && ($result = $this->compile_output_filter($compiler, $filter[0], $output)) !== false) {