Retrieve and display a PHP session variable

PHP Cookies and Sessions: Exercise-5 with Solution

Write a PHP script to retrieve and display the value of the session variable "userid".

Sample Solution:

PHP Code :

<?php
session_save_path('i:/custom/');
session_start();
if (isset($_SESSION["userid"])) {
    $userid = $_SESSION["userid"];
    echo "Value of session variable 'userid': " . $userid;
} else {
    echo "Session variable 'userid' not found.";
}
?>

Sample Output:

Value of session variable 'userid': 10020

Explanation:

In the above exercise -

• The code starts with session_save_path('i:/custom/'). This line sets a custom path (i:/custom/) for storing session files. You should replace i:/custom/ with the actual path where you want to store session files. This step is optional and allows you to specify a custom session storage location.
• The code then calls session_start(). This function initializes a new or existing session. It enables session variables throughout the script. It must be called before accessing or setting session variables.
• After starting the session, the code checks if the session variable named "userid" is set using isset($_SESSION["userid"]). If the session variable is set, it enters the if block.
• Inside the if block, it retrieves the value of the session variable "userid" using $_SESSION["userid"] and assigns it to the variable $userid.

Flowchart:

PHP Code Editor:

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