เอา id ล่าสุดไปใส่ใน table ที่เก็บเป็น multiple image

<?php 
// Include the database configuration file 
include('config/dbconfig.php');

$head_name_news = $_POST['head_name_news'];
$details_news = $_POST['details_news'];
$an_status = $_POST['an_status'];
$attach     = $_FILES['files'];
//เพิ่มข้อมูล teble1
$sql1 = " INSERT INTO news
(head_name_news, details_news, an_status)
VALUES
('$head_name_news', '$details_news' , '$an_status')";

if (mysqli_query($db, $sql1)) {
  $last_id = mysqli_insert_id($db);
  echo "New record created successfully. Last inserted ID is: " . $last_id;
} else {
  echo "Error: " . $sql1 . "<br>" . mysqli_error($db);
}
//เพิ่มข้อมูล teble1

if(isset($_POST['submit'])){ 
    // File upload configuration 
    $targetDir = "assets/img/offers/"; 
    $allowTypes = array('jpg','png','jpeg','gif'); 
     
    $statusMsg = $errorMsg = $insertValuesSQL = $errorUpload = $errorUploadType = ''; 
    $fileNames = array_filter($_FILES['files']['name']); 
    if(!empty($fileNames)){ 
        foreach($_FILES['files']['name'] as $key=>$val){ 
            // File upload path 
            $fileName = basename($_FILES['files']['name'][$key]); 
            $targetFilePath = $targetDir . $fileName; 
             
            // Check whether file type is valid 
            $fileType = pathinfo($targetFilePath, PATHINFO_EXTENSION); 
            if(in_array($fileType, $allowTypes)){ 
                // Upload file to server 
                if(move_uploaded_file($_FILES["files"]["tmp_name"][$key], $targetFilePath)){ 
                    // Image db insert sql 
                    $insertValuesSQL .= "('".$fileName."', NOW()),"; 
                }else{ 
                    $errorUpload .= $_FILES['files']['name'][$key].' | '; 
                } 
            }else{ 
                $errorUploadType .= $_FILES['files']['name'][$key].' | '; 
            } 
        } 
         
        // Error message 
        $errorUpload = !empty($errorUpload)?'Upload Error: '.trim($errorUpload, ' | '):''; 
        $errorUploadType = !empty($errorUploadType)?'File Type Error: '.trim($errorUploadType, ' | '):''; 
        $errorMsg = !empty($errorUpload)?'<br/>'.$errorUpload.'<br/>'.$errorUploadType:'<br/>'.$errorUploadType; 
         
        if(!empty($insertValuesSQL)){ 
            $insertValuesSQL = trim($insertValuesSQL, ','); 
            // Insert image file name into database 
echo $last_id;
            $insert = "INSERT INTO images (file_name, uploaded_on, id_news) VALUES $insertValuesSQL, $last_id"; 
            if($insert){ 
                $statusMsg = "Files are uploaded successfully.".$errorMsg; 
            }else{ 
                $statusMsg = "Sorry, there was an error uploading your file."; 
            } 
        }else{ 
            $statusMsg = "Upload failed! ".$errorMsg; 
        } 
    }else{ 
        $statusMsg = 'Please select a file to upload.'; 
    } 
} 


?>