How to trim a variable in Smarty template code?

Question

Smarty

Hello! The site code contains the following construction: I want to display the first 70 characters from it. Attempts to do through https://www.smarty.net/docsv2/ru/language.function... or so www.php.su/functions/?substr were unsuccessful. How can I do that?
<title>{$section_info.title}</title>

Answer 1

In Smarty, functions are applied through a vertical bar, parameters are specified after the function name, separated by a colon:
{$section_info.title|mb_substr:0:70}

Answer 2

mb_substr ($title, 0 , 70)