PHP / MySQL上传带有注释的图像并打印出来

我正在做一个网站，非常简单，顺便说一句，它已经完成了，但是有些问题让我解决了！ 以下是 3 页：

索引.php http://pastebin.com/whQfhPEy
管理员.php http://pastebin.com/pQCsphCa
上传.php：

<?php
mysql_connect("localhost", "xxxx", "xxxx");
mysql_select_db("xxxx");
$target_dir = "uploads/";
$target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);
$uploadOk = 1;
$imageFileType = pathinfo($target_file,PATHINFO_EXTENSION);
// Check if image file is a actual image or fake image
if(isset($_POST["submit"])) {
    $check = getimagesize($_FILES["fileToUpload"]["tmp_name"]);
    if($check !== false) {
        echo "File is an image - " . $check["mime"] . ".";
        $uploadOk = 1;
    } else {
        echo "File is not an image.";
        $uploadOk = 0;
    }
}
// Check if file already exists
if (file_exists($target_file)) {
    echo "Sorry, file already exists.";
    $uploadOk = 0;
}
// Check file size
if ($_FILES["fileToUpload"]["size"] > 500000) {
    echo "Sorry, your file is too large.";
    $uploadOk = 0;
}
// Allow certain file formats
if($imageFileType != "jpg" && $imageFileType != "png" && $imageFileType != "jpeg"
&& $imageFileType != "gif" ) {
    echo "Sorry, only JPG, JPEG, PNG & GIF files are allowed.";
    $uploadOk = 0;
}
// Check if $uploadOk is set to 0 by an error
if ($uploadOk == 0) {
    echo "Sorry, your file was not uploaded.";
// if everything is ok, try to upload file
} else {
    if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) {
        echo "The file ". basename( $_FILES["fileToUpload"]["name"]). " has been uploaded.";
    } else {
        echo "Sorry, there was an error uploading your file.";
    }
}
?>

索引.php打印通过管理员上传的消息/图像.php
admin.php用于提交数据/图像，以便可以在索引上显示这种方式.php
上传.php在管理员上按下提交按钮时调用.php

问题：我需要修改上传.php以某种方式在每个上传的图像上放置一个 ID，以便可以使用其 ID 打印在索引上.php它应该如何？