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There are times when it is necessary (and good practice) to terminate a session and destroy all data associated with the current session. The function session_destroy is responsible for handling the described actions; however, this function is limited in its ability by not unsetting (or clearing) the global variables tied to the session or the respective cookies. This requires a more detailed approach: <?php session_start(); // Unset all session variables $_SESSION = array(); // Unset all cookie variables if(isset($_COOKIE[session_name()])){ setcookie(session_name(),'', time()-48000,'/'); } ?>

As stated earlier, the process of PHP maintaining information from one session to the next for a visitor is pretty straight forward without lacking in capability. This maintaining of information (getting to know the end user) is accomplished through session handling tasks. Starting a Session It is necessary to tell PHP when to open up its eyes and prepare for the possibility of having to get to know an end user. This process is accomplished through the function session_start(). This function initializes the session data or continues the current session that is being passed by a request, such as a GET, POST or a cookie. <?php session_start(); ?> Setting up the Session "Key" After starting the session process, it is important to identify the "key" by which the user will be remembered. This key is stored on the end users machine and is called when interacting with the end user machine with the same function; session_id(). <?php session_s