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(PHP 4, PHP 5)

session_id -- Get and/or set the current session id

Description

string session_id ( [string id] )

session_id() returns the session id for the current session.

If id is specified, it will replace the current session id. session_id() needs to be called before session_start() 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 and 0-9 !

The constant SID can also be used to retrieve the current name and session id as a string suitable for adding to URLs. Note that SID is only defined if

Related Function(s)

session_start()

session_set_save_handler()