Features of the transition from Smarty 2 to Smarty 3 (mysmarty.class.php)

Hello everyone, I change the "engine" i. Smarty 2 on Smarty 3, in the script settings (config.php) in PHP using Smarty 2 is:

require_once($config['basedir'].'/smarty/libs/Smarty.class.php'); require_once($config['basedir'].'/libraries/mysmarty.class.php'); ... STemplate::assign ... STemplate::setCompileDir ... STemplate::setTplDir ... 

In index.php (the main one in the root of the domain) is:

 STemplate::display('header.tpl'); STemplate::display('index.tpl'); STemplate::display('footer.tpl'); 

Smarty.class.php is standard (all with comments), and in a special file (mysmarty.class.php) there is this:

 <?php class STemplate { function STemplate() { global $Smarty; if (!isset($Smarty)) { $Smarty = new Smarty; } } function create() { global $Smarty; $Smarty = new Smarty(); $Smarty->compile_check = true; $Smarty->debugging = false; $Smarty->template_dir = dirname(__FILE__) . "/../../themes"; $Smarty->compile_dir = dirname(__FILE__) . "/../../temporary"; return true; } function setCompileDir($dir_name) { global $Smarty; if (!isset($Smarty)) { STemplate::create(); } $Smarty->compile_dir = $dir_name; } function setType($type) { global $Smarty; if (!isset($Smarty)) { STemplate::create(); } $Smarty->type = $type; } function assign($var, $value) { global $Smarty; if (!isset($Smarty)) { STemplate::create(); } $Smarty->assign($var, $value); } function setTplDir($dir_name = null) { global $Smarty; if (!isset($Smarty)) { STemplate::create(); } if (!$dir_name) { $Smarty->template_dir = dirname(__FILE__) . "/../../themes/default"; } else { $Smarty->template_dir = $dir_name; } } function setModule($module) { global $Smarty; if (!isset($Smarty)) { STemplate::create(); } $Smarty->theme = $module; $Smarty->type = "module"; } function setTheme($theme) { global $Smarty; if (!isset($Smarty)) { STemplate::create(); } $Smarty->template_dir = dirname(__FILE__) . "/../../themes/" . $theme; $Smarty->compile_dir = dirname(__FILE__) . "/../../temporary/" . $theme; $Smarty->theme = $theme; $Smarty->type = "theme"; } function getTplDir() { global $Smarty; if (!isset($Smarty)) { STemplate::create(); } return $Smarty->template_dir; } function display($filename) { global $Smarty; if (!isset($Smarty)) { STemplate::create(); } $Smarty->display($filename); } function fetch($filename) { global $Smarty; if (!isset($Smarty)) { STemplate::create(); } return $Smarty->fetch($filename); } function getVars() { global $Smarty; if (!isset($Smarty)) { STemplate::create(); } return $Smarty->get_template_vars(); } } ?> 

Calling functions in files comes with STemplate :: ...

The question is whether something needs to be changed in mysmarty.class.php when switching from Smarty 2 to Smarty 3 (except for files from the developer)? PS foreach in the project template file is running