<form method ="POST" enctype="multipart/form-data">
<input type="file" name="download" size="10" />
<input type="submit" value="Загрузить">
</form>
if($_FILES["download"]["error"] == UPLOAD_ERR_OK){
echo $_FILES["download"]["tmp_name"]."<br>";
echo "Файл загружен <br><br>";
}