(PHP 4, PHP 5, PHP 7, PHP 8)
posix_getsid — Get the current sid of the process
$process_id
) : int|false
Return the session id of the process process_id.
The session id of a process is the process group id of the session leader.
process_id
The process identifier. If set to 0, the current process is
assumed. If an invalid process_id is
specified, then false is returned and an error is set which
can be checked with posix_get_last_error().
Returns the identifier, as an int, 或者在失败时返回 false.
Example #1 Example use of posix_getsid()
<?php
$pid = posix_getpid();
echo posix_getsid($pid); //8805
?>