Include database connection information from not native connection file #drupal8+

legacy_database_info.php

<?php

$legacy_db_key = 'project_legacy_db';

// Define database connection for local lando env.
if (getenv('LANDO_INFO')) {
  $lando_info = json_decode(getenv('LANDO_INFO'), TRUE);
  $databases[$legacy_db_key]['default'] = [
    'database' => 'project_legacy',
    'username' => $lando_info['database']['creds']['user'],
    'password' => $lando_info['database']['creds']['password'],
    'prefix' => '',
    'host' => $lando_info['database']['internal_connection']['host'],
    'port' => $lando_info['database']['internal_connection']['port'],
    'namespace' => 'Drupal\\Core\\Database\\Driver\\mysql',
    'driver' => 'mysql',
  ];
}
else {
  // Otherwise, get connection info from legacy production db.
  $extraDatabases = [
    'default' => [
      'default' => [],
    ],
  ];
  $code = @file_get_contents('/var/www/site-php/project.prod/D9-prod-settings.inc');

  if (empty($code)) {
    return;
  }

  $code = str_replace('<?php', '', $code);
  // Rename $databases variable into $extraDatabases,
  // to avoid overriding default $databases variable.
  $code = str_replace('databases', 'extraDatabases', $code);
  // Comment out code imports, since we need only array with connection info.
  $code = str_replace('require', '//', $code);
  $code = str_replace('include', '//', $code);
  try {
    eval($code);
  }
  catch (\ParseError $exception) {}

  if (!empty($extraDatabases['default']['default'])) {
    $databases[$legacy_db_key]['default'] = $extraDatabases['default']['default'];
  }
}