/**
*
* 连接并登陆ftp服务器
*
* @param string $host
* @param string $username
* @param string $password
* @param int $port
* @param int $timeout
* @param bool $pasv
* @return bool
*/
public static function connect($host, $username, $password, $port = 21, $timeout = 90, $pasv = false)
{
if ((self::$resource = ftp_connect($host, $port, $timeout)) === false) {
throw_exception('ftp unable to connect');
}
if (!self::login($username, $password)) {
throw_exception('ftp unable to login');
}
if ($pasv === true) {
self::pasv($pasv);
}
return true;
}
