(PHP 4, PHP 5, PHP 7) Returns the size of the given file

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Retrieves a file from the FTP server and writes it to an open file (non-blocking)

(PHP 4 >= 4.0.3, PHP 5, PHP 7) Requests execution of a command on the FTP server

(PHP 5, PHP 7) Sends an arbitrary command to an FTP server

(PHP 4, PHP 5, PHP 7) Logs in to an FTP connection

(PHP 4 >= 4.2.0, PHP 5, PHP 7) Set miscellaneous runtime FTP options

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Opens an Secure SSL-FTP connection

(PHP 4, PHP 5, PHP 7) Alias of

(PHP 4, PHP 5, PHP 7) Sends a SITE command to the server

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Stores a file from an open file to the FTP server (non-blocking)