start_render example

            if (!$_template->source->uncompiled) {
                $_smarty_tpl = $_template;
                if ($_template->source->recompiled) {
                    if ($this->smarty->debugging) {
                        Smarty_Internal_Debug::start_compile($_template);
                    }
                    $code = $_template->compiler->compileTemplate($_template);
                    if ($this->smarty->debugging) {
                        Smarty_Internal_Debug::end_compile($_template);
                    }
                    if ($this->smarty->debugging) {
                        Smarty_Internal_Debug::start_render($_template);
                    }
                    try {
                        ob_start();
                        eval("?>" . $code);
                        unset($code);
                    } catch (Exception $e) {
                        ob_get_clean();
                        throw $e;
                    }
                } else {
                    if (!$_template->compiled->exists || ($_template->smarty->force_compile && !$_template->compiled->isCompiled)) {