session_id(3) [php man page]

SESSION_ID(3)								 1							     SESSION_ID(3)

session_id - Get and/or set the current session id

SYNOPSIS

       string session_id ([string  $id])

DESCRIPTION

       session_id(3) is used to get or set the session id for the current session.

	The  constant  SID  can also be used to retrieve the current name and session id as a string suitable for adding to URLs. See also Session
       handling.

PARAMETERS

	      o $id
		- If $id is specified, it will replace the current session id. session_id(3) needs to be called before session_start(3)  for  that
		purpose.  Depending  on  the  session handler, not all characters are allowed within the session id. For example, the file session
		handler only allows characters in the range a-z A-Z 0-9 , (comma) and - (minus)!

	      Note

		      When using session cookies, specifying an $id for session_id(3) will always send	a  new	cookie	when  session_start(3)	is
		     called, regardless if the current session id is identical to the one being set.

RETURN VALUES

       session_id(3)  returns  the session id for the current session or the empty string ( "") if there is no current session (no current session
       id exists).

SEE ALSO

       session_regenerate_id(3), session_start(3), session_set_save_handler(3), session.save_handler.

PHP Documentation Group 													     SESSION_ID(3)

SESSION_REGENERATE_ID(3)						 1						  SESSION_REGENERATE_ID(3)

session_regenerate_id - Update the current session id with a newly generated one

SYNOPSIS

       bool session_regenerate_id ([bool  $delete_old_session = false])

DESCRIPTION

       session_regenerate_id(3) will replace the current session id with a new one, and keep the current session information.

PARAMETERS

	      o $delete_old_session
		- Whether to delete the old associated session file or not.

RETURN VALUES

	Returns TRUE on success or FALSE on failure.

CHANGELOG

       +--------+---------------------------------------------------+
       |Version |						    |
       |	|						    |
       |	|		     Description		    |
       |	|						    |
       +--------+---------------------------------------------------+
       | 4.3.3	|						    |
       |	|						    |
       |	|  Since  then, if session cookies are enabled, use |
       |	| of session_regenerate_id(3) will  also  submit  a |
       |	| new session cookie with the new session id.	    |
       |	|						    |
       | 5.1.0	|						    |
       |	|						    |
       |	|      Added the $delete_old_session parameter.     |
       |	|						    |
       +--------+---------------------------------------------------+
EXAMPLES

       Example #1

	      A session_regenerate_id(3) example

	      <?php
	      session_start();

	      $old_sessionid = session_id();

	      session_regenerate_id();

	      $new_sessionid = session_id();

	      echo "Old Session: $old_sessionid<br />";
	      echo "New Session: $new_sessionid<br />";

	      print_r($_SESSION);
	      ?>

SEE ALSO

       session_id(3), session_start(3), session_name(3).

PHP Documentation Group 												  SESSION_REGENERATE_ID(3)