Uploader archívů: chyba

if ((($_FILES == "application/zip") || ($_FILES == "application/x-rar-compressed") || ($_FILES == "text/plain")) && ($_FILES < 5000000)) { if ($_FILES > 0) { echo "Kód: " . $_FILES . "
"; } else { echo "Název souboru: " . $_FILES . "
"; echo "Typ (formát): " . $_FILES . "
"; echo "Velikost: " . ($_FILES / 1024) . " Kb
"; if (file_exists("upload/" . $_FILES)) { echo $_FILES . " již existuje. "; } else { move_uploaded_file($_FILES, "upload/" . $_FILES); echo "Cesta k souboru: " . "upload/" . $_FILES; } } } else { echo "Soubor nesplňuje všechny požadavky (formát, velikost)!"; } ?>