How delete old updated images with their Alternates?

[tbebest]

Hi, i wanna delete old updated images with considering its index in array.
i use global $oldimg = array() for storing their names but when i use theme at line 105-108 below, they aren't set;
here is my form:

<?php
global $oldimg;
$oldimg = array();
//action: edit news     
if (isset($_GET['id'])) {
    $NewsID = (int)$_GET['id'];
    if ($NewsID == 0) {
        $rdir = '<META HTTP-EQUIV="Refresh" CONTENT="1.4;URL=panel-news.php">';
        die($rdir);}
 
//get user from the database and put data into $_POST variables.
    //Include database connection details
    require_once('../config.php');    
    //Connect to mysql server
    $link = mysql_connect(DB_HOST, DB_USER, DB_PASSWORD);
    if(!$link) {
         die('Failed to connect to server: ' . mysql_error());
                }
    //Select database
     $db = mysql_select_db(DB_DATABASE);
     if(!$db) {
            die("Unable to select database");
                }
    $rs = mysql_query("SELECT  newsimg1, newsimg2, ".
    " newsimg3 FROM news WHERE id = $NewsID");
if (mysql_num_rows($rs) == 0) die('no such a news!');
    $row = mysql_fetch_assoc($rs);
    $oldimg[0] = $row['newsimg1'];
    $oldimg[1] = $row['newsimg2'];
    $oldimg[2] = $row['newsimg3'];
}
?>
<form method="post" action="<?php echo $_SERVER['PHP_SELF'] ?>"
             enctype="multipart/form-data">
                <input type=file name="file[]" size=20 
                accept="image/jpg,image/jpeg,image/png">
                <input type=file name="file[]" size=20 
                accept="image/jpg,image/jpeg,image/png">
                <input type=file name="file[]" size=20 
                accept="image/jpg,image/jpeg,image/png">
                <input type="hidden" name="MAX_FILE_SIZE" value="2097152" />
                <input type="hidden" name="NewsID" 
                value='<?php echo (isset($NewsID))?$NewsID:"0";?>'>
                <input type="submit" value="edit" id="save"  name="save"/>
            </form>
            <?php
            if (isset($_POST['save']) && isset($_POST['NewsID'])){
                $NewsID = (int)$_POST['NewsID'];
              //Include database connection details
              require_once('../config.php');
              //Connect to mysql server
              $link = mysql_connect(DB_HOST, DB_USER, DB_PASSWORD);
              if(!$link) {
                   die('Failed to connect to server: ' . mysql_error());
                          }
              //Select database
              $db = mysql_select_db(DB_DATABASE);
              if(!$db) {
                  die("Unable to select database");
                        }
              //max fle size value
              $max_file_size = 2097152;
              //Global newsimg
              global $newsimg;global $ctr;
              $ctr = 0;
              //timestamp to make files unique names
              $timestamp = time();
              //destination folder path
              $destpath = "../Dir/Newsimg/";
              //looping each file or image from the form
              while(list($key,$value) = @each($_FILES["file"]["name"])) {
              //check if any empty or errors
              if(!empty($value)){
              if ($_FILES["file"]["error"][$key] > 0) {
              $edir ='<div id="fail" class="info_div">';
              $edir .='<span class="ico_cancel"><strong>';
              $edir .="err : ".  $_FILES["file"]["error"][$key]  .'</strong></span></div>';
              echo($edir);
              } else {
              //add the timestamp to filename
              $file_name = $timestamp.$_FILES['file']['name'];
              //temp name from upload form,  key of each is set
              $source = $_FILES["file"]["tmp_name"][$key] ;
              //getting the file type
              $file_type = $_FILES["file"]["type"][$key];
              //placing each file name into a variable
              $filename1 = $_FILES["file"]["name"][$key];
              //lowering the file names
              $filename = strtolower($filename1);
              //adding timestamp to front of file name
              $filename = "$timestamp$filename";
              ++$timestamp;
              if ($file_type != "image/jpeg" && $file_type != "image/png" && $file_type != "image/jpg") {
                die("
                <div id='fail' class='info_div'>
                <span class='ico_cancel'><strong>
                Invalid Format!</strong></span><br />
                <a href=\"javascript: history.go(-1)\">Retry</a>
                </div>"); }
             //moving the file to be saved from the temp location to the destination path
              move_uploaded_file($source, $destpath . $filename);
              //the actual final location with timestamped name
              $final_file_location = "$destpath$filename";
              if (file_exists($final_file_location)) {
                  if (isset($oldimg[$ctr])) {
                      chdir('../Dir/Newsimg/');
                      echo $oldimg[$ctr];
                      unlink($oldimg[$ctr]);}
                  $newsimg[$ctr] = $filename;
                  $ctr++;
 
?>