What best practices should PHP developers follow to prevent unauthorized access to their index.php file?

To prevent unauthorized access to the index.php file, PHP developers should implement proper access control measures. This can include using .htaccess files to restrict access, implementing user authentication, and ensuring that sensitive information is not exposed in the index.php file. 

<?php
// Check if a session is not already started
if(session_status() == PHP_SESSION_NONE){
    session_start();
}

// Check if the user is not authenticated
if(!isset($_SESSION['authenticated']) || $_SESSION['authenticated'] !== true){
    header('HTTP/1.0 403 Forbidden');
    echo 'Unauthorized access';
    exit;
}

// The rest of your index.php code goes here

Keywords

PHP security access control authentication authorization

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