How can PHP applications be made more secure by preventing certain "subpages" from being accessed through the browser address bar?

To prevent certain "subpages" from being accessed through the browser address bar, you can implement a check in your PHP application to verify if the user has the necessary permissions to access the page. This can be done by checking the user's session or role before allowing access to the page. Additionally, you can use URL rewriting or routing to ensure that only specific URLs can be accessed. 

<?php
session_start();

if(!isset($_SESSION['user']) || $_SESSION['user']['role'] !== 'admin') {
    header("Location: /error_page.php");
    exit();
}
?>

Keywords

PHP application security access control URL rewriting htaccess

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