How can session variables be used to securely pass data in PHP applications?

Session variables can be used to securely pass data in PHP applications by storing sensitive information on the server side rather than passing it through URLs or forms where it can be easily intercepted. To use session variables, you can set data in the session using the $_SESSION superglobal array and retrieve it on subsequent pages. This helps to maintain the integrity and confidentiality of the data being passed between pages. 

// Start the session
session_start();

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

// Retrieve the session variable on another page
session_start();
$username = $_SESSION['username'];
echo $username;

Keywords

session variables data passing security PHP applications encryption

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