session_name
Get and/or set the current session name
Description
stringfalse session_name(stringnull $name = null)
If a new session name is
supplied, session_name modifies the HTTP cookie
(and outputs the content when session.use_trans_sid is
enabled). Once the HTTP cookie has been
sent, calling session_name raises an E_WARNING.
session_name must be called
before session_start for the session to work
properly.
The session name is reset to the default value stored in
session.name at request startup time. Thus, you need to
call session_name for every request (and before
session_start is called).
Parameters
-
name
-
The session name references the name of the session, which is
used in cookies and URLs (e.g. PHPSESSID). It
should contain only alphanumeric characters; it should be short and
descriptive (i.e. for users with enabled cookie warnings).
If name is specified and not null, the name of the current
session is changed to its value.
Warning
The session name can't consist of digits only, at least one letter
must be present. Otherwise a new session id is generated every time.
Return Values
Returns the name of the current session. If name is given
and function updates the session name, name of the old session
is returned, or false on failure.
Examples
Example #1 session_name example
<?php
/* set the session name to WebsiteID */
$previous_name = session_name("WebsiteID");
echo "The previous session name was $previous_name<br />";
?>