How Session Works? Session work by creating a unique identification(UID) number for each visitor and storing variable based on this ID. This helps to prevent two user data from getting confused with another when visiting the same webpage. The UID is either stored in a cookie or is propagated in the URL. Starting a PHP Session Before you can store user information in your php session, you must first start up the session. The session_start() function must appear before the <html> tag.
<?php session_start();?> <html> <body> .... .... .... .... </body> </html>Storing a Session Variable The correct way to store and retrieve session variables is to use the PHP $_SESSION variable.
<?php session_start(); //store session data $_SESSION['views']=1; ?> <html> <body> .... .... .... .... </body> </html>Retrieving a Session
<?php session_start();?> <html> <body> echo "Pageviews=".$_session['views']; </body> </html>Output : Pageviews=1 Destroying A Session The unset() function is used to free the specified session variable.
<?php unset($_session['views']); ?You can also completely destroy the session by calling the session_destroy() function :
<?php session_destroy(); ?>session_distroy() will reset your session and you will lose all your stored session data.]]>