Sevgili dostlar, bu sadece dosya yüklemek ve neden bu değil çalışma veritabanına dosya eklemek bir script? Sadece dosya upload ve hatta doğrulama sonra db dosya gönderecek. Lütfen yardım

<?php

//file validation starts
//split filename into array and substract full stop from the last part
$tmp = explode('.', $_FILES['photo']['name']);
$fileext= $tmp[count($tmp)-1];

//read the extension of the file that was uploaded
$allowedexts = array("png");
if(in_array($fileext, $allowedexts)){
    return true;
}else{
    $form_error= "Upload file was not supported<br />";
    header('Location: apply.php?form_error=' .urlencode($form_error));
}


//file validation ends

//upload dir for pics
$uploaddir = './uploads/';


//upload file in folder
$uploadfile = $uploaddir. basename($_FILES['photo']['name']);


//insert filename in mysql db
$upload_filename = basename($_FILES['photo']['name']);



//upload the file now
    move_uploaded_file($_FILES['photo']['tmp_name'], $uploadfile);

// $photo value is goin to db
$photo = $upload_filename;