how to check if 'file' input has been entered?

[__greg]

this seems simple and stupid, but i can't seem to figure out how to test if a file input form has been filled out (if a file has been selected)

i've tried all of these things and they ALWAYS return "No image"... even if i have in fact selected the file to upload:

if (empty($_POST[fileupload])) {
					$display_block .= "no image";
				}

			else {
				$display_block .= "there is an image, continue...";
			}

---

if ($_POST[fileupload] == "") {
					$display_block .= "no image";
				}

			else {
				$display_block .= "there is an image, continue...";
			}

---

if (!$_POST[fileupload]) {
					$display_block .= "no image";
				}

			else {
				$display_block .= "there is an image, continue...";
			}

the file input form is named "fileupload"... anyone know how i can test for the input?

[Drakla]

$FILES[] is the superglobal for files, not $POST - look up the complete details in the php manual