No entiendo la linea que me has puesto :(
Me da este error:
Notice: Undefined variable: id in /opt/lampp/htdocs/index.php on line 44
Warning: unlink(/opt/lampp/htdocs/files/) [function.unlink]: Is a directory in /opt/lampp/htdocs/index.php on line 44
La linea 44 es:
Código PHP:
unlink($_SERVER['DOCUMENT_ROOT'] . '/files/' . $id);