Pommo_Helper::isAjax PHP Method

    function isAjax()
    {
        return isset($_SERVER['HTTP_X_REQUESTED_WITH']) && $_SERVER['HTTP_X_REQUESTED_WITH'] == 'XMLHttpRequest';
    }

 public static function preInit($baseDir)
 {
     //	Remove quotes added by magic_quotes
     if (get_magic_quotes_gpc()) {
         $process = array(&$_GET, &$_POST, &$_COOKIE, &$_REQUEST);
         while (list($key, $val) = each($process)) {
             foreach ($val as $k => $v) {
                 unset($process[$key][$k]);
                 if (is_array($v)) {
                     $process[$key][stripslashes($k)] = $v;
                     $process[] =& $process[$key][stripslashes($k)];
                 } else {
                     $process[$key][stripslashes($k)] = stripslashes($v);
                 }
             }
         }
         unset($process);
     }
     self::$_baseDir = $baseDir;
     self::$_config = array();
     self::$_auth = null;
     self::$_escaping = false;
     require_once self::$_baseDir . 'classes/Pommo_Log.php';
     require_once self::$_baseDir . 'lib/SafeSQL.class.php';
     require_once self::$_baseDir . 'classes/Pommo_Db.php';
     require_once self::$_baseDir . 'classes/Pommo_Auth.php';
     // 	initialize logger
     //	Check where this config variable comes from
     self::$_logger = new Pommo_Log();
     self::$_workDir = empty($config['workDir']) ? self::$_baseDir . 'cache' : $config['workDir'];
     self::$_debug = strtolower($config['debug']) != 'on' ? false : true;
     self::$_default_subscriber_sort = empty($config['default_subscriber_sort']) ? 'email' : $config['default_subscriber_sort'];
     self::$_verbosity = empty($config['verbosity']) ? 3 : $config['verbosity'];
     self::$_logger->_verbosity = self::$_verbosity;
     self::$_dateformat = $config['date_format'] >= 1 && $cofig['date_format'] <= 3 ? intval($config['date_format']) : 1;
     //	set base URL (e.g. http://mysite.com/news/pommo => 'news/pommo/')
     if (isset($config['baseURL'])) {
         self::$_baseUrl = $config['baseURL'];
     } else {
         // 	If we're called from an embedded script, read baseURL from
         //	"last known good". Else, set it based off of REQUEST.
         if (defined('_poMMo_embed')) {
             require_once self::$_baseDir . 'classes/Pommo_Helper_Maintenance.php';
             self::$_baseUrl = Pommo_Helper_Maintenance::rememberBaseURL();
         } else {
             $regex = '@/(ajax|inc|setup|user|install|support(/tests|/util)?|' . 'admin(/subscribers|/user|/mailings|/setup)?' . '(/ajax|/mailing|/config)?)$@i';
             // This is to fix backslashes on windows systems
             $dirname = str_replace('\\', '/', dirname($_SERVER['PHP_SELF']));
             $baseUrl = preg_replace($regex, '', $dirname);
             self::$_baseUrl = $baseUrl == '/' ? $baseUrl : $baseUrl . '/';
         }
     }
     // read in config.php (configured by user)
     $config = Pommo_Helper::parseConfig(self::$_baseDir . 'config.php');
     //	check to see if config.php was "properly" loaded
     if (count($config) < 5) {
         self::$_hasConfigFile = false;
         return self::$_hasConfigFile;
     }
     self::$_hasConfigFile = true;
     //	the regex strips port info from hostname
     self::$_hostname = empty($config['hostname']) ? preg_replace('/:\\d+$/i', '', $_SERVER['HTTP_HOST']) : $config['hostname'];
     self::$_hostport = empty($config['hostport']) ? $_SERVER['SERVER_PORT'] : $config['hostport'];
     self::$_ssl = !isset($_SERVER['HTTPS']) || strtolower($_SERVER['HTTPS']) != 'on' ? false : true;
     self::$_http = (self::$_ssl ? 'https://' : 'http://') . self::$_hostname;
     if (self::$_hostport != 80 && self::$_hostport != 443) {
         self::$_http .= ':' . self::$_hostport;
     }
     self::$_language = empty($config['lang']) ? 'en' : strtolower($config['lang']);
     self::$_slanguage = defined('_poMMo_lang') ? _poMMo_lang : false;
     //	include translation (l10n) methods if language is not English
     self::$_l10n = FALSE;
     if (self::$_language != 'en') {
         self::$_l10n = TRUE;
         require_once self::$_baseDir . 'classes/Pommo_Helper_L10n.php';
         Pommo_Helper_L10n::init(self::$_language, self::$_baseDir);
     }
     //	set the current "section" -- should be "user" for /user/* files,
     //	"mailings" for /admin/mailings/* files, etc. etc.
     self::$_section = preg_replace('@^admin/?@i', '', str_replace(self::$_baseUrl, '', dirname($_SERVER['PHP_SELF'])));
     $db_conn_compress = strtolower($config['db_conn_compress']) != 'on' ? 0 : MYSQL_CLIENT_COMPRESS;
     $db_conn_secure = strtolower($config['db_conn_secure']) != 'on' ? 0 : MYSQL_CLIENT_SSL;
     // 	initialize database link
     self::$_dbo = @new Pommo_Db($config['db_username'], $config['db_password'], $config['db_database'], $config['db_hostname'], $config['db_prefix'], $db_conn_compress, $db_conn_secure);
     // 	turn off debugging if in user area
     if (self::$_section == 'user') {
         self::$_debug = false;
         self::$_dbo->debug(FALSE);
     }
     // if debugging is set in config.php, enable debugging on the database.
     if (self::$_debug) {
         // don't enable debugging in ajax requests unless verbosity is < 3
         if (Pommo_Helper::isAjax() && self::$_verbosity > 2) {
             self::$_debug = false;
         } else {
             self::$_dbo->debug(TRUE);
         }
     }
     return true;
 }