(PHP 4, PHP 5 < 5.4.0) Initializes all syslog related variables

(PHP 4, PHP 5, PHP 7) Checks if or where headers have been sent

(PHP >= 5.3.0) Gets the host name string gethostname

(PHP 4 >= 4.1.0, PHP 5, PHP 7) Receives data from a socket whether or not it is connection-oriented

(PECL ssh2 >= 0.9.0) Authenticate over SSH using a plain password

(PHP 4, PHP 5, PHP 7) Decode URL-encoded strings

(PECL ssh2 >= 0.9.0) Authenticate as "none"

(PHP 4 >= 4.0.2, PHP 5, PHP 7) Return the length of the output buffer

(PECL ssh2 >= 0.9.0) Resolve the realpath of a provided path string

(PHP 4 >= 4.1.0, PHP 5, PHP 7) Alias of