Проблема с ajax

$query_img = mysqli_query($link,"SELECT * FROM uploads_images WHERE products_id='$id'");
 
If (mysqli_num_rows($query_img) > 0)
{
    
$result_img = mysqli_fetch_array($query_img);
do
{
if  (strlen($result_img["image"]) > 0 && file_exists("../uploads_images/".$result_img["image"]))
{
$img_path = '../uploads_images/'.$result_img["image"];
$max_width = 100; 
$max_height = 110; 
 list($width, $height) = getimagesize($img_path); 
$ratioh = $max_height/$height; 
$ratiow = $max_width/$width; 
$ratio = min($ratioh, $ratiow); 
 
$width = intval($ratio*$width); 
$height = intval($ratio*$height);  
 
}else
{
$img_path = "./images/noimages.png";
$width = 90;
$height = 70;
}
echo ' 
 <li id="del'.$result_img["id"].'" >
 <img src="'.$img_path.'" width="'.$width.'" height="'.$height.'" title="'.$result_img["image"].'" />
 <a class="del-img" img_id="'.$result_img["id"].'" ></a>        
 </li>
  ';  
    
}while ($result_img = mysqli_fetch_array($query_img));
}

<?php
if($_SERVER["REQUEST_METHOD"] == "POST")
{
include("../include/db_connect.php"); 
 
$path = $_SERVER['DOCUMENT_ROOT']."/uploads_images/".$_POST["title"];
 
        if (file_exists($path))
        {  
          unlink($path);
          $delete = mysqli_query($link,"DELETE FROM uploads_images WHERE id = '{$_POST["id"]}'"); 
          echo "delete";   
        }
        else
        {
           echo "delete"; 
           $delete = mysqli_query($link,"DELETE FROM uploads_images WHERE id = '{$_POST["id"]}'");  
        }
 
}
?>

header("Location: index.php");
exit;

$path = $_SERVER['DOCUMENT_ROOT']."/uploads_images/".$row["title"]; 
if (file_exists($path)) {  
    unlink($path);
}

mysqli_query($link,"DELETE FROM uploads_images WHERE id = ".intval($_POST["id"]));