Insert or Get Term ID

insert_or_get_term_id.php

<?php

/**
 * (WordPress) Insert or get term id
 * 
 * @return int Term ID (0 no term was inserted or found)
 */
function __wp_insert_or_get_term_id($name, $taxonomy, $parent = 0) {
    if (!($term = get_term_by("name", $name, $taxonomy))) {
        $insert = wp_insert_term($name, $taxonomy, array(
            "parent" => $parent
        ));
        if (is_wp_error($insert)) {
            return 0;
        }
        return intval($insert["term_id"]);
    }
    return intval($term->term_id);
}