Elgg\Cache\MetadataCache::clear PHP Метод

    public function clear($entity_guid)
    {
        foreach (array_keys($this->values) as $access_key) {
            unset($this->values[$access_key][$entity_guid]);
        }
    }

 /**
  * Update a specific piece of metadata.
  *
  * @param int    $id         ID of the metadata to update
  * @param string $name       Metadata name
  * @param string $value      Metadata value
  * @param string $value_type Value type
  * @param int    $owner_guid Owner guid
  * @param int    $access_id  Access ID
  *
  * @return bool
  */
 function update($id, $name, $value, $value_type, $owner_guid, $access_id)
 {
     $id = (int) $id;
     if (!($md = $this->get($id))) {
         return false;
     }
     if (!$md->canEdit()) {
         return false;
     }
     $value_type = detect_extender_valuetype($value, $this->db->sanitizeString(trim($value_type)));
     $owner_guid = (int) $owner_guid;
     if ($owner_guid == 0) {
         $owner_guid = $this->session->getLoggedInUserGuid();
     }
     $access_id = (int) $access_id;
     // Support boolean types (as integers)
     if (is_bool($value)) {
         $value = (int) $value;
     }
     // If ok then add it
     $query = "UPDATE {$this->table}\n\t\t\tSET name = :name,\n\t\t\t    value = :value,\n\t\t\t\tvalue_type = :value_type,\n\t\t\t\taccess_id = :access_id,\n\t\t\t    owner_guid = :owner_guid\n\t\t\tWHERE id = :id";
     $result = $this->db->updateData($query, false, [':name' => $name, ':value' => $value, ':value_type' => $value_type, ':access_id' => $access_id, ':owner_guid' => $owner_guid, ':id' => $id]);
     if ($result !== false) {
         $this->cache->clear($md->entity_guid);
         // @todo this event tells you the metadata has been updated, but does not
         // let you do anything about it. What is needed is a plugin hook before
         // the update that passes old and new values.
         $obj = $this->get($id);
         $this->events->trigger('update', 'metadata', $obj);
     }
     return $result;
 }