How to rewrite custom title and description only for blog in WordPress using child theme functions.php

Question

How can I rewrite meta title and description in Wordpress using child theme functions.php?

I want to rewrite it only on main blog page (for example: www.example.com/blog), where I have listed all articles.

The problem is that the main theme already adds title and description to blog page. So I need to remove them first and then add custom ones.

Thank you very much for your help.

Answer 1

First off, WordPress does not add a <meta name=decription> tag. That is usually done by a seo plugin like Yoast, therefor the method for overriding it differ per plugin. Or theme.

You might be a able to change these texts in the wp-admin settings, again depending on the plugin/theme.

The title you should be able to change using this example:

function SO_52811727_wp_title($title) {

    // see https://codex.wordpress.org/Conditional_Tags for more options
    if ( is_archive() ){
        $title = 'custom title';
    }

    return $title;
}
add_filter('wp_title', 'SO_52811727_wp_title', 100);