nonce() public method

Generate a unique nonce for each registered meta_box
Since: 2.0.0
public nonce ( ) : string
return string unique nonce string
 /**
  * Handles saving of the $_POST data
  * @since  0.1.3
  * @param  int $term_id Term's ID
  */
 public function do_save($term_id)
 {
     if (!class_exists('CMB2')) {
         return;
     }
     $object_id = $this->id($term_id);
     if (isset($_POST[$this->cmb->nonce()]) && wp_verify_nonce($_POST[$this->cmb->nonce()], $this->cmb->nonce())) {
         $this->do_override_filters($term_id);
         $this->cmb->save_fields($object_id, 'options-page', $_POST);
     }
 }
 /**
  * Determine whether the CMB2 object should be saved. All tests must be true, hence return false for
  * any failure.
  *
  * @param string $id @since 1.1.0
  * @param \CMB2 $cmb
  *
  * @return bool
  *
  * @since 1.1.0 static unclung
  * @since 1.0.3 made static method
  * @since 1.0.1
  */
 private function should_save($cmb, $id)
 {
     // was this flagged to save fields?
     if (!$cmb->prop('save_fields')) {
         return FALSE;
     }
     // are these values set?
     if (!isset($_POST['submit-cmb'], $_POST['object_id'], $_POST[$cmb->nonce()])) {
         return FALSE;
     }
     // does the nonce match?
     if (!wp_verify_nonce($_POST[$cmb->nonce()], $cmb->nonce())) {
         return FALSE;
     }
     // does the object_id equal the settings key?
     if (!$_POST['object_id'] == self::$props[$id]['key']) {
         return FALSE;
     }
     return TRUE;
 }