Fatal error: Uncaught --> Smarty Compiler: Syntax error in template {php}{/php} tags not allowed. Use SmartyBC to enable them

To fix php error:

PHP ERROR:

Fatal error: Uncaught --> Smarty Compiler: Syntax error in template "file:XXXXXX.tpl" on line 18 "

change:

$smarty = new Smarty();

to:

$smarty = new SmartyBC();