Mime类型(限制/允许应用程序/八位字节流,即.bin和.rar

So I run this type of code in my wp $filetype = wp_check_filetype($_POST['file']); $type = $_FILES['file'];

    if($type['type'] == 'application/x-zip-compressed'){

    }else{
        if($type['type'] == 'application/octet-stream'){

and I come up with small issue that I can't get around...The problem is that we allow .rar .zip only to be uploaded on the server however application/octet-stream is .bin which we do not accept. I wonder if there is a way of stopping the .bin file while application/octet-stream is in act. appreciate any help