What is the importance of starting a session in PHP and how does it affect variables in links?

Starting a session in PHP is important because it allows you to store and access variables across multiple pages for a single user. This is useful for maintaining user login state, storing shopping cart items, or any other data that needs to persist throughout a user's visit to a website. When a session is started, PHP assigns a unique session ID to the user, which is typically stored in a cookie. This session ID is then used to associate variables with that specific user. 

<?php
// Start the session
session_start();

// Set a session variable
$_SESSION['username'] = 'john_doe';

// Access the session variable on another page
echo $_SESSION['username'];
?>

Keywords

PHP session variables links data sharing

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