Get custom taxonomy term url on archive page

Question

This is driving me crazy, so please help me guys with this.

I'm trying to add a metatag to custom taxonomy ter archive page header which contains the url of the term archive page of a custom taxonomy.

How to get the URL of the archive page when there's neither specified term nor the taxonomy itself.

Answer 1

If you are in term archive page, the taxonomy and term is actually set. You could hook wp_head to add the open graph in your functions.php:

 add_action( 'wp_head', 'wpse_wp_head' );
 function wpse_wp_head () {

      //First, we check if we are in our custom taxonomy
      if( is_tax('my-custom-taxonomy') ) {

           $taxonomy_slug = get_query_var( 'taxonomy' );
           $term_slug = get_query_var( 'term' );
           $term_url = get_term_link( $term_slug, $taxonomy_slug );

           //Add Open Graph property
           echo '<meta property="og:url" content="'. esc_url( $term_url ) .'">';

           //If you need the full object of current term
           //$term = get_term_by( 'slug', $term_slug, $taxonomy_slug );
           //Now you can get all the term data. For example:
           //$term->name, $term->term_id, $term->slug,.....

      }

 }

Answer 2

I finally found the right answer for my question:

First add this code:

function get_tax_data($data){
    if(!$data)
        return;
    global $wp_query;
    $term = $wp_query->get_queried_object();

    if($data == 'title')
        return $term->name;

    if($data == 'description')
        return strip_tags($term->description);

    if($data == 'link') {
        $link = get_term_link($term);
        return $link;
    }
}

Now just add following to call the slug:

$the_tax = get_tax_data('link');