How can PHP scripts be used to check for session variables before displaying images to users?

To check for session variables before displaying images to users, you can use PHP to verify if the session variable containing the user's authentication status is set. If the session variable is not set, you can redirect the user to a login page or display an error message instead of showing the images. 

<?php
session_start();

// Check if the session variable indicating user authentication is not set
if(!isset($_SESSION['authenticated'])) {
    // Redirect to login page or display an error message
    header("Location: login.php");
    exit;
}

// Display images to authenticated users
?>
<!DOCTYPE html>
<html>
<head>
    <title>Image Gallery</title>
</head>
<body>
    <img src="image1.jpg" alt="Image 1">
    <img src="image2.jpg" alt="Image 2">
    <img src="image3.jpg" alt="Image 3">
</body>
</html>

Keywords

PHP session variables image display conditional statements authentication.

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