Session regenerated ID

session_regenerate_id() works to regenerate the session by replacing oldsessionid. 

For this, first start the session, 

set the sessionid equal to oldsessionid and print oldsessionid. 

Now use the session_regenrateid and set this id to new sessionid.

<?php
session_start();
print_r($_SESSION);
echo "<br />";
$oldsessionid = session_id();
echo "Old Session:". $oldsessionid."<br />";
session_regenerate_id();

$newsessionid = session_id();
echo "New Session:". $newsessionid."<br />";

?>

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