How to exclude site category in php file of output tags in head?

Question

PHP

Tell me how to exclude the category of a site with a url like sitename.com/blog/page1...99 using php in the php file (meta.php) which is responsible for displaying page meta tags in the head of the site? It is necessary that meta tags are not displayed on the pages of this category. Sorry if this is a stupid question, I don't know much about php.