Find tid by name in drupal 8

taxonomy-term.php

<?php

  /**
   * Utility: find term by name and vid.
   * @param null $name
   *  Term name
   * @param null $vid
   *  Term vid
   * @return int
   *  Term id or 0 if none.
   */
  protected function getTidByName($name = NULL, $vid = NULL) {
    $properties = [];
    if (!empty($name)) {
      $properties['name'] = $name;
    }
    if (!empty($vid)) {
      $properties['vid'] = $vid;
    }
    $terms = \Drupal::entityManager()->getStorage('taxonomy_term')->loadByProperties($properties);
    $term = reset($terms);

    return !empty($term) ? $term->id() : 0;
  }

?>