# posix_getsid

(PHP 4, PHP 5, PHP 7)

posix_getsid — Get the current sid of the process

### Description

posix_getsid ( int `$pid` ) : int

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 int.

### Examples

Example #1 Example use of posix_getsid()

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

### See Also

- posix_getpgid() - Get process group id for job control
- posix_setsid() - Make the current process a session leader
- POSIX man page GETSID(2)