How to set utf-8 for "mysqli_connect_error"?

Question

PHP

Good day!
There is an error message about connecting to MySQL:

// Error message
    if (mysqli_connect_errno()) { 
        echo "<div id=\"mysqli-error\">Подключение к серверу MySQL невозможно. Проверьте конфигурацию подключения.<br /><font>Причина ошибки: ", mysqli_connect_error()."</font></div>";
    }

I am using OpenServer. I think the question is clear, I don't know what else to add. Except:
Encoding "mysqli_connect_error" - Windows-1251
Naturally, on a page with utf-8 encoding, it returns shorthands.
Thanks to all who responded!

Answer 1

mysqli_set_charset() ?

Answer 2

I don’t know why you need windows 1251 on sites and Microsoft uses utf 8, basically, well, if you need it.
Tembolee 1251!
51 encoding was removed in Windows 7 :)
This encoding was supported by xp, vista, replaced by 1252.
You can set the encoding you need by default in .htass (I don’t remember how), or set the database settings in phpmyadmin and select the desired encoding.