In what ways can PHP developers prevent unauthorized access or misuse of PHP files through URL manipulation?

To prevent unauthorized access or misuse of PHP files through URL manipulation, developers can implement access control measures such as checking user authentication, validating user permissions, and restricting direct access to sensitive files by using .htaccess rules. 

// Example code snippet to prevent unauthorized access to PHP files
session_start();

if(!isset($_SESSION['logged_in']) || $_SESSION['logged_in'] !== true) {
    header('Location: login.php');
    exit;
}

Keywords

.htaccess file permissions input validation session management CSRF protection

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