PHP Conference China 2020


(PHP 4 >= 4.3.0, PHP 5, PHP 7)

ftp_ssl_connectOpens a Secure SSL-FTP connection


ftp_ssl_connect ( string $host [, int $port = 21 [, int $timeout = 90 ]] ) : resource

ftp_ssl_connect() opens an explicit SSL-FTP connection to the specified host. That implies that ftp_ssl_connect() will succeed even if the server is not configured for SSL-FTP, or its certificate is invalid. Only when ftp_login() is called, the client will send the appropriate AUTH FTP command, so ftp_login() will fail in the mentioned cases.

Note: Why this function may not exist

Before PHP 7.0.0, ftp_ssl_connect() was only available if both the ftp module and the OpenSSL support have been built statically into php; this means that on Windows this function had been undefined in the official PHP builds. To have this function available on Windows, it had been necessary to compile own PHP binaries.


ftp_ssl_connect() is not intended for use with sFTP. To use sFTP with PHP, please see ssh2_sftp().



The FTP server address. This parameter shouldn't have any trailing slashes and shouldn't be prefixed with ftp://.


This parameter specifies an alternate port to connect to. If it is omitted or set to zero, then the default FTP port, 21, will be used.


This parameter specifies the timeout for all subsequent network operations. If omitted, the default value is 90 seconds. The timeout can be changed and queried at any time with ftp_set_option() and ftp_get_option().

Return Values

Returns a SSL-FTP stream on success or FALSE on error.


Version Description
5.2.2 The function was changed to return FALSE when it can't use an SSL connection, instead of falling back to a non-SSL one as previously.


Example #1 ftp_ssl_connect() example


// set up basic ssl connection
$conn_id ftp_ssl_connect($ftp_server);

// login with username and password
$login_result ftp_login($conn_id$ftp_user_name$ftp_user_pass);

if (!
$login_result) {
// PHP will already have raised an E_WARNING level message in this case
die("can't login");

ftp_pwd($conn_id); // /

// close the ssl connection

See Also

add a note add a note

User Contributed Notes 1 note

mmm3567 at gmail dot com
8 years ago
Something that isn't mentioned above is that although ftp_ssl_connect may be available and will return an FTP stream it may not be usable. Take the following code (FTP login credentials are obviously set elsewhere):

$ftp_connection = @ftp_ssl_connect($this->ftp_host);
$ftp_connection = @ftp_connect($this->ftp_host);
ftp_login($ftp_connection, $this->ftp_user, $this->ftp_password);
// output: bool(true) resource(71) of type (FTP Buffer)

From this you'd assume everything would work, ftp_ssl_connect is available and you have a connection. However, once you get to ftp_login, you could get this:

Warning [2] ftp_login() [function.ftp-login]: AUTH not understood

This is because the server is not configured to understand the encrypted details, even though the function is available and an SSL-FTP stream was opened.

If you are trying to use ftp_ssl_connect make sure you check if you can login after using it, and if not, connect again with standard ftp_connect.

Hope this is of use.
To Top