$t('RobotsTxt'), 'severity' => REQUIREMENT_ERROR, 'value' => $t('Clean URLs are mandatory for this module.', array('!clean_url' => url('admin/settings/clean-urls'))), ); } // Webservers prefer the robots.txt file on disk and does not allow menu path overwrite. if (file_exists('./robots.txt')) { $requirements['robotstxt_file'] = array( 'title' => $t('RobotsTxt'), 'severity' => REQUIREMENT_WARNING, 'value' => $t('RobotsTxt module works only if you remove the existing robots.txt file in your website root.'), ); } } return $requirements; }