PHP HELP.

Hi.
I created my first blog: https://www.insomnia.art.br/valve/ but I still have a lot of doubts. If anyone could help me.

When I enter this line in my horizontal menu, the css class isn’t active, how I fix this?

<li<?php if(is_page(‘wp-gallery2.php’)) echo ” class=\”active\””; ?>>/wp-gallery2.php” title=”Galeria de Fotos”>Galeria

Thanks.