Restricting uploads to zip

Hi. I'm writing a file upload script and I want to restrict users to be able to only upload zip files.



What is the condition I would need to add to this IF statement? I've looked around the web but I can only find solutions for uploading images.


if ($_FILES["file"]["size"] < 3145728) && ____________________ {
my code
}

Wait this is a PHP question... I have no idea why I asked it here.

ummmmm....


($_FILES["file"]["type"] == "application/zip")