src/Request.php
public function getUserHost()
    {
        if (isset($this->_userHost)) {
            return $this->_userHost;
        }
        return $this->_userHost = isset($_SERVER['REMOTE_HOST']) ? $_SERVER['REMOTE_HOST'] : null;
    }
public function getUserHost()
    {
        if (isset($this->_userHost)) {
            return $this->_userHost;
        }
        return $this->_userHost = isset($_SERVER['REMOTE_HOST']) ? $_SERVER['REMOTE_HOST'] : null;
    }
public function getUserHost ( ) { if ( isset ( $ this -> _userHost ) ) { return $ this -> _userHost ; } return $ this -> _userHost = isset ( $ _SERVER [ 'REMOTE_HOST' ] ) ? $ _SERVER [ 'REMOTE_HOST' ] : null ; }
Returns the user host name, null if it cannot be determined.

@return string user host name, null if cannot be determined
Returns the user host name null if it cannot be determined .