<?php
 if ($_FILES["logo"] && ($_FILES["logo"]["type"] == "image/jpeg" || $_FILES["logo"]["type"] == "image/jpg" || $_FILES["logo"]["type"] == "image/png" || $_FILES["logo"]["type"] == "image/gif")):
    $logo_name = $_FILES["logo"]["name"];
    $logo_newname = "images/logo.png";
    $upload_logo = move_uploaded_file($_FILES["logo"]["tmp_name"], $logo_newname);
elseif ($imagecek['image1'] != ""):
    $logo_newname = $imagecek['image1'];
endif;