You need to have two slashes in the first line for it to be a comment. Try copying and pasting the code again.

I tried the code that you gave for Rank Math, but it still doesn’t work for my blog post titles. :S

This is the code I added in the functions.php file:
/* Shortcode to display the current year in WordPress
//* shortcode: [year]
add_shortcode( ‘year’ , ‘current_year’ );
function current_year() {
$year = date(“Y”);
return “$year”;
}
add_filter( ‘the_title’, ‘do_shortcode’ ); // activate shortcode in WP Title
add_filter( ‘rank_math/frontend/title’, ‘do_shortcode’ ); // activate shortcode in Rank Math Title
add_filter( ‘rank_math/frontend/description’, ‘do_shortcode’ ); //activate shortcode in Rank Math Meta Description

For my blog post title, I wrote “The Best XXXXX in [year]“. However, on the front end, it was shown as “The Best XXXXX in [year]” instead of “The Best XXXXX in 2020”, which is why I’ve changed back the blog post title to “The Best XXXXX” for now.

Do you have any idea what could have gone wrong?

By using the code, you can use the shortcode anywhere in your post or page across your site. The Rank Math variables (%currentyear% and %currentmonth%) only work in the title and meta description from what I understand.

🙂

No problem. Thanks! ?