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   1. drupal6
   2. drupal7

Helper function for install_settings_validate.

Code

./install.php, line 353

<?php
function _install_settings_form_validate($db_prefix, $db_type, $db_user, $db_pass, $db_host, $db_port, $db_path, $settings_file, &$form_state, $form = NULL) {
  global $db_url;

  // Verify the table prefix
  if (!empty($db_prefix) && is_string($db_prefix) && !preg_match('/^[A-Za-z0-9_.]+$/', $db_prefix)) {
    form_set_error('db_prefix', st('The database table prefix you have entered, %db_prefix, is invalid. The table prefix can only contain alphanumeric characters, periods, or underscores.', array('%db_prefix' => $db_prefix)), 'error');
  }

  if (!empty($db_port) && !is_numeric($db_port)) {
    form_set_error('db_port', st('Database port must be a number.'));
  }

  // Check database type
  if (!isset($form)) {
    $_db_url = is_array($db_url) ? $db_url['default'] : $db_url;
    $db_type = substr($_db_url, 0, strpos($_db_url, '://'));
  }
  $databases = drupal_detect_database_types();
  if (!in_array($db_type, $databases)) {
    form_set_error('db_type', st("In your %settings_file file you have configured @drupal to use a %db_type server, however your PHP installation currently does not support this database type.", array('%settings_file' => $settings_file, '@drupal' => drupal_install_profile_name(), '%db_type' => $db_type)));
  }
  else {
    // Verify
    $db_url = $db_type . '://' . urlencode($db_user) . ($db_pass ? ':' . urlencode($db_pass) : '') . '@' . ($db_host ? urlencode($db_host) : 'localhost') . ($db_port ? ":$db_port" : '') . '/' . urlencode($db_path);
    if (isset($form)) {
      form_set_value($form['_db_url'], $db_url, $form_state);
    }
    $success = array();

    $function = 'drupal_test_' . $db_type;
    if (!$function($db_url, $success)) {
      if (isset($success['CONNECT'])) {
        form_set_error('db_type', st('In order for Drupal to work, and to continue with the installation process, you must resolve all permission issues reported above. We were able to verify that we have permission for the following commands: %commands. For more help with configuring your database server, see the <a href="http://drupal.org/node/258">Installation and upgrading handbook</a>. If you are unsure what any of this means you should probably contact your hosting provider.', array('%commands' => implode($success, ', '))));
      }
      else {
        form_set_error('db_type', '');
      }
    }
  }
}
?>