Get current term’s ID

Im using the following code to get an array of children taxonomies and write them out with links in an unordered list.

    <?php
$termID = 10;
$taxonomyName = "products";
$termchildren = get_term_children( $termID, $taxonomyName );

echo '<ul>';
foreach ($termchildren as $child) {
    $term = get_term_by( 'id', $child, $taxonomyName );
    echo '<li><a href="' . get_term_link( $term->name, $taxonomyName ) . '">' . $term->name . '</a></li>';
}
echo '</ul>';
?>

What I’m trying to achieve is to get the actual term (category) id so I can replace it on $termID and don’t have to hardcode the id of the term.

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Any help would be kindly appreciated!

Thanks!

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4 comments

  1. Here is a function I use to list subterms:

    /**
     * Lists all subentries of a taxonomy.
     *
     * @return void
     */
    function ttt_get_subterms( $args = array () )
    {
        if ( ! isset ( get_queried_object()->taxonomy ) )
        {
            return;
        }
    
        $options = array (
            'child_of'           => get_queried_object_id()
        ,   'echo'               => 0
        ,   'taxonomy'           => get_queried_object()->taxonomy
        ,   'title_li'           => FALSE
        ,   'use_desc_for_title' => FALSE
        );
    
        $settings = array_merge( $options, $args );
    
        $subtermlist = wp_list_categories( $settings );
    
        // Without results WP creates a dummy item. It doesn't contain links.
        ! empty ( $subtermlist ) and FALSE !== strpos( $subtermlist, '<a ' )
            and print "<ul class=subterms>$subtermlist</ul>";
    }
    

    Use it like wp_list_categories().

    Avoid get_term_by(). It is very expensive and not necessary.

  2. To get the Current term you can use get_query_var( 'term' ); and to get the current taxonomy you can use get_query_var( 'taxonomy' ) so you can do something like this:

    $term_slug = get_query_var( 'term' );
    $taxonomyName = get_query_var( 'taxonomy' );
    $current_term = get_term_by( 'slug', $term_slug, $taxonomyName );
    $termchildren = get_term_children( $current_term->term_id, $taxonomyName );
    
    echo '<ul>';
    foreach ($termchildren as $child) {
        $term = get_term_by( 'id', $child, $taxonomyName );
        echo '<li><a href="' . get_term_link( $term->name, $taxonomyName ) . '">' . $term->name . '</a></li>';
    }
    echo '</ul>';
    
  3. Or you can use : term_exists( $term, $taxonomy, $parent )

    $term_id = term_exists( $term_name );
    

    See WordPress Codex

    Check if a given term exists and return the term ID

    Returns the term ID if no taxonomy was specified and the term exists.