"Couldn't connect to ssl" when using ftp_ssl_connect to connect to port 22

Question

While trying to connect the server through ftp_ssl_connect I'm facing two issues.

$conn_id = ftp_ssl_connect($ftp_server, <port_num>, 20)
$login_result = ftp_login( $conn_id, $ftp_user_name, $ftp_user_pass );

1. In this above command while using the port_num as 22 it showing the message

   Couldn't connect to ssl

   But while using 0 as port_num its getting connected.

2. There other issue was, while using 0 as port_num the ftp_login throws the following error

   Warning: ftp_login(): Command not implemented for that parameter

Note: I have tried to connect the server through FileZilla – it's working.

Answer 1

The ftp_ssl_connect connects using FTPS protocol (FTP over TLS/SSL).

The port 22 is used for SFTP protocol (over SSH).

Those are completely different protocols.

See How to SFTP with PHP?