Drupal - Load term by name

You can use snippet code like by using entityTypeManager :

$term_name = 'Term Name';
$term = \Drupal::entityTypeManager()
      ->getStorage('taxonomy_term')
      ->loadByProperties(['name' => $term_name]);

This functionality appears to be deprecated in Drupal 8.
Use the taxonomy_term_load_multiple_by_name function instead.

Example

<?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;
  }

?>

To load a single term ID by term name and vocabulary in Drupal 8 you can use the following snippet.

$term = \Drupal::entityTypeManager()->getStorage('taxonomy_term')
  ->loadByProperties(['name' => $term_name, 'vid' => 'job_category']);
$term = reset($term);
$term_id = $term->id();