Club Drupal

  // Test database-specific multi-byte UTF-8 related requirements.

  $charset_requirements = _system_check_db_utf8mb4_requirements($phase);

  if (!empty($charset_requirements)) {

    $requirements['database_charset'] = $charset_requirements;

  }

/**

 * Checks whether the requirements for multi-byte UTF-8 support are met.

 *

 * @param string $phase

 *   The hook_requirements() stage.

 *

 * @return array

 *   A requirements array with the result of the charset check.

 */

function _system_check_db_utf8mb4_requirements($phase) {

  global $install_state;

  // In the requirements check of the installer, skip the utf8mb4 check unless

  // the database connection info has been preconfigured by hand with valid

  // information before running the installer, as otherwise we cannot get a

  // valid database connection object.

  if (isset($install_state['settings_verified']) && !$install_state['settings_verified']) {

    return array();

  }

  $connection = Database::getConnection();

  $t = get_t();

  $requirements['title'] = $t('Database 4 byte UTF-8 support');

  $utf8mb4_configurable = $connection->utf8mb4IsConfigurable();

  $utf8mb4_active = $connection->utf8mb4IsActive();

  $utf8mb4_supported = $connection->utf8mb4IsSupported();

  $driver = $connection->driver();

  $documentation_url = 'https://www.drupal.org/node/2754539';

  if ($utf8mb4_active) {

    if ($utf8mb4_supported) {

      if ($phase != 'install' && $utf8mb4_configurable && !variable_get('drupal_all_databases_are_utf8mb4', FALSE)) {

        // Supported, active, and configurable, but not all database tables

        // have been converted yet.

        $requirements['value'] = $t('Enabled, but database tables need conversion');

        $requirements['description'] = $t('Please convert all database tables to utf8mb4 prior to enabling it in settings.php. See the <a href="@url">documentation on adding 4 byte UTF-8 support</a> for more information.', array('@url' => $documentation_url));

        $requirements['severity'] = REQUIREMENT_ERROR;

      }

      else {

        // Supported, active.

        $requirements['value'] = $t('Enabled');

        $requirements['description'] = $t('4 byte UTF-8 for @driver is enabled.', array('@driver' => $driver));

        $requirements['severity'] = REQUIREMENT_OK;

      }

    }

    else {

      // Not supported, active.

      $requirements['value'] = $t('Not supported');

      $requirements['description'] = $t('4 byte UTF-8 for @driver is activated, but not supported on your system. Please turn this off in settings.php, or ensure that all database-related requirements are met. See the <a href="@url">documentation on adding 4 byte UTF-8 support</a> for more information.', array('@driver' => $driver, '@url' => $documentation_url));

      $requirements['severity'] = REQUIREMENT_ERROR;

    }

  }

  else {

    if ($utf8mb4_supported) {

      // Supported, not active.

      $requirements['value'] = $t('Not enabled');

      $requirements['description'] = $t('4 byte UTF-8 for @driver is not activated, but it is supported on your system. It is recommended that you enable this to allow 4-byte UTF-8 input such as emojis, Asian symbols and mathematical symbols to be stored correctly. See the <a href="@url">documentation on adding 4 byte UTF-8 support</a> for more information.', array('@driver' => $driver, '@url' => $documentation_url));

      $requirements['severity'] = REQUIREMENT_INFO;

    }

    else {

      // Not supported, not active.

      $requirements['value'] = $t('Disabled');

      $requirements['description'] = $t('4 byte UTF-8 for @driver is disabled. See the <a href="@url">documentation on adding 4 byte UTF-8 support</a> for more information.', array('@driver' => $driver, '@url' => $documentation_url));

      $requirements['severity'] = REQUIREMENT_INFO;

    }

  }

  return $requirements;

}

  // Ensure the schema versions are not based on a previous module list.

  drupal_static_reset('drupal_get_schema_versions');

/**

 * Remove the Drupal 6 default install profile if it is still in the database.

 */

function system_update_7081() {

  // Sites which used the default install profile in Drupal 6 and then updated

  // to Drupal 7.44 or earlier will still have a record of this install profile

  // in the database that needs to be deleted.

  db_delete('system')

    ->condition('filename', 'profiles/default/default.profile')

    ->condition('type', 'module')

    ->condition('status', 0)

    ->condition('schema_version', 0)

    ->execute();

}