Can I call .html file as a form action instead of .php?

Hello, Some guy told me that I can call the .html file as a form action instead of ..php file. So he said I could do something like this, echo "<td><a href=\"editStaff.html?id=$id\">Edit</a></td>"; instead echo "<td><a href=\"editStaff.php?id=$id\">Edit</a></td>"; editStaff.html and editStaff.php have the same content, only the file name is different. But if I do the former way(call editStaff.html as a form action), it doesn't work. It calls some files but looks horrible. So the advice of the guy was wrong, or did I do something wrong? Thanks,