PHP/Cookie Session/session destroy

Destroying a session

 
<?php
session_start(  );
$_SESSION["username"] = "Michele";
session_destroy(  );
echo "At this point we can still see the value of username as ";
echo $_SESSION["username"]."<br />";
unset ($_SESSION["username");
if (is_null($_SESSION["username"])) {
    echo "Now the value of username is (blank)";
}
?>

Ending a Session

 
<?
    session_start( );
    $_SESSION = array( );
    session_destroy( );
?>

function session_destroy() ends all persistent data corresponding to the current user session.

 
Its syntax is: boolean session_destroy()
<?
session_start();
// do some session stuff
session_destroy();
?>