# posix_getsid

(PHP 4, PHP 5)

posix_getsid — Get the current sid of the process

### Description

int posix_getsid ( int `$pid` )

Return the session id of the process `pid` . The session id of a process is the process group id of the session leader.

### Parameters

`pid`

  The process identifier. If set to 0, the current process is assumed. If an invalid `pid` is specified, then `FALSE` is returned and an error is set which can be checked with posix_get_last_error().

### Return Values

Returns the identifier, as an integer.

### Examples

Example#1 Example use of posix_getsid()

`<?php
$pid = posix_getpid();
echo posix_getsid($pid); //8805
?>`

### See Also

- posix_getpgid()
- posix_setsid()
- POSIX man page GETSID(2)