ftp_ssl_connect opens an explicit SSL-FTP connection to the specified hostname. 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.
Returns an FTP\Connection instance on success, or false on failure.
|8.1.0||Returns an FTP\Connection instance now; previously, a resource was returned.|