POP3::authorise( string $host, int|bool $port = false, int|bool $timeout = false, string $username = '', string $password = '', int $debug_level = 0 ): bool

200    public function authorise($host, $port = false, $timeout = false, $username = '', $password = '', $debug_level = 0)201    {202        $this->host = $host;203        //If no port value provided, use default204        if (false === $port) {205            $this->port = static::DEFAULT_PORT;206        } else {207            $this->port = (int) $port;208        }209        //If no timeout value provided, use default210        if (false === $timeout) {211            $this->tval = static::DEFAULT_TIMEOUT;212        } else {213            $this->tval = (int) $timeout;214        }215        $this->do_debug = (int) $debug_level;216        $this->username = self::stripControls($username);217        $this->password = self::stripControls($password);218        //Reset the error log219        $this->errors = [];220        //Connect221        $result = $this->connect($this->host, $this->port, $this->tval);222        if ($result) {223            $login_result = $this->login($this->username, $this->password);224            if ($login_result) {225                $this->disconnect();226 227                return true;228            }229        }230        //We need to disconnect regardless of whether the login succeeded231        $this->disconnect();232 233        return false;234    }