HTTP 508 Loop Detected

What is HTTP 508 Loop Detected?

The 508 (Loop Detected) status code indicates that the server terminated an operation because it encountered an infinite loop while processing a request. This is used in WebDAV to detect and break infinite binding loops.

Common Use Cases

• WebDAV binding loop detection
• Infinite redirect detection

// Middleware to detect redirect loops
$_redirectCount = $_SERVER['HTTP_X_REDIRECT_COUNT'] ?? 0;
if ($_redirectCount > 10) {
    http_response_code(508);
    echo json_encode(['error' => 'Redirect loop detected']);
    exit;
}