Dynamic meta titles for pages with URL parameters?

Question

I've got a page called /team-page/?id=x that's built in WordPress

The URL parameter of "id" determines the content that will dynamically show on that page. However, my meta title for that page is statically set. Is there a way I can dynamically set the meta title based on the page content? Each variation of /team-page will have a unique H1 - ideally, I'd love to just grab this H1 and set it as the meta title.

Answer 1

You can achieve it with document_title_parts filter. It takes $titles as parameter, which consist of two parts - title and site (except for front page - instead of site it's tagline)

So try this

add_filter( 'document_title_parts', 'custom_title' );
function custom_title( $title ) {

    // Just to see what is $title
    // echo '<pre>';
    // print_r( $title );
    // echo '</pre>';
    // die();

    $uri = parse_url( $_SERVER['REQUEST_URI'], PHP_URL_PATH ); // get current uri without query params

    // Change meta only on team-page. 
    if ( '/team-page/' === $uri ) {
        // you can do here anything you want
        $title['title'] = get_the_title() . ' and whatever string you want ' . $_GET['id'];
    }
    return $title;
}

Also don't forget to check and sanitize your $_GET['id'] if needed.