Set WordPress custom excerpt from Rank Math SEO plugin

 Sometimes, we need to set different excerpts for showing posts on the blog page. In this post, we are going to share a piece of code that works perfectly to change a posts' excerpt programmatically. 

function rankmath_post_excerpt(){

        $id = get_the_ID();

        $post_type = get_post_type( get_the_ID() );

        if ($post_type == 'post') {

            $meta_description = get_post_meta($id,'rank_math_description',true);

            return $meta_description; 

        }else{

            return;

        }

        

}

function check_for_rankmath_activation(){

    if ( is_plugin_active( 'seo-by-rank-math/rank-math.php' ) ){

        add_filter('get_the_excerpt', 'rankmath_post_excerpt' );

        add_filter('the_excerpt', 'rankmath_post_excerpt' );

    }

}

add_action('init','check_for_rankmath_activation');