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

(PECL gearman >= 0.5.0) Get an errno value

(PHP 4 >= 4.0.5, PECL yaz >= 0.9.0) Prepares for a scan

(PECL sam >= 0.1.0) The header properties of the message.

(PECL event >= 1.2.6-beta) Adds a domain to the list of search domains

(PECL gearman >= 0.5.0) Set a callback for worker warnings

(PHP 4, PHP 5, PHP 7) Renames a file or a directory on the FTP server

(PECL event >= 1.2.6-beta) Creates two buffer events connected to each other

(PHP 4, PHP 5, PHP 7) Opens an FTP connection

(PECL gearman >= 0.5.0) Returns an error string for the last error encountered.