• PHP session is used to store and pass information from one page to another page temporarily until the user closes website.
  • In shopping website PHP website is widely used where we need to store and pass cart information from one page to another.
  • For example. username, product code, product name, product price etc.
  • The session creates unique user id for each browser to recognize the user and avoid conflict between multiple browsers.
  • PHP session_start () function is used to start the session and starts new and resume existing session.
  • If session is created already then it returns existing session and if session is not available, it returns and creates new session.
  • It is an associative array that contains all session variables and it is used to get and set session variables.

Syntax

<?php
  
           session_start();
  
            ?>

Sample Code

<?php
                 session_start();
                ?>
              <!DOCTYPE html>
              <html>
              <body>

              <?php
               // Echo session variables that were set on previous page
                 echo "Favorite color is " . $_SESSION["favcolor"] . ".<br>";
                 echo "Favorite animal is " . $_SESSION["favanimal"] . ".";
              ?>

            </body>
            </html>

Output

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