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Sessions In PHP
// this is compulsory statement if you want to access session variable in the page. This indicates that we are going to access session variables in this page
// store session data
$_SESSION[‘userid’] = 1;
//retrieve session data
echo "Userid=" . $_SESSION[userid];
session_destroy(); // will reset your session and you will lose all your stored session data.
This very basic use of session say now you want to change the value of session and want to check if the session exits.
if (isset($_SESSION['views'])) $_SESSION['views'] = $_SESSION['views'] + 1;
else $_SESSION['views'] = 1;
echo "Views=" . $_SESSION['views'];