Gimana cara nya supaya file/gambar ikut terhapus sesuai id menggunakan checkbox(all checkbox)

master nanya ni kenapa file/gambarnya tidak dihapus sesuai permintaan contoh ada 4 item ketika dihapus menggunakan all checkbox file/gambarnya yg di foldernya hanya satu terhapus klo datanya normal bisa terhapus semua di data base

<!-- form.php-->

 <?php
echo '<div class="panel-body">';
      $result1 = mysql_query("SELECT * from data_barang");

      echo '<br> ';
echo '<form name="form" action="hapus_barang" method="post" onsubmit="return deleteConfirm();"/>';
echo '<div class="table_container">';
echo '<table class="table datatable">';
      echo '<thead>';
      echo '<tr>';
      echo '<th><input type="checkbox" name="select_all" id="select_all" value=""/></th>';
      echo '<th width="7%">No.</th>';
      echo '<th width="10%">ITEM CODE</th>';
      echo ' <th width="38%">DESCRIPTION</th>';
      echo '<th width="10%">MODEL</th> ';
      echo '<th width="10%">CATEGORY</th> ';
      echo '<th width="5%">QTY</th> ';
      echo '<th width="5%">UNIT</th> ';
      echo '<th width="8%">LOCATION</th> ';
      echo '<th width="7%">ACTION</th> ';
      echo '</tr>';
      echo '</thead>';

             echo '<tbody>';
      while($row = mysql_fetch_array($result1)){
             echo '<tr>';
             echo "<td><input type='checkbox' name='checked_id[]' class='checkbox' value='".$row['id']."'/></td>";

             $foto = ''.$row["foto"].'';
             echo "<td >" . $row["id"] . "</td>";
             echo "<td>" . $row["new_code"] . "</td>";
             echo "<td>" . $row["description"] . "</td>";
	     echo "<td>" . $row["model"] . "</td>";
	     echo "<td>" . $row["category"] ."</td>";
	     echo "<td>" . $row["qty"] ."</td>";
	     echo "<td>" . $row["unit"] ."</td>";
	     echo "<td>" . $row["location"] ."</td>";
            echo'<input type="hidden"  name="foto" value="'.$foto.'">';
             echo "<td>

<a href='#myModal'id='custId' data-toggle='modal' data-id=".$row['id']."><span class='btn btn-success' data-toggle='tooltip' data-placement='top' title='detail item'>Detail</span></a>
                  </td>";
                  echo'</tr>';
                  }
                 echo'</tbody>';
                 echo'</table>';
echo'<input type="submit" class="btn btn-danger" name="delete_submit" value="Hapus"/>';
		 echo'</form>';
		 echo'</div>';
                 echo'</div>';
                 echo'</div>';
                 ?>

<!-- ni file prosess php-->
<!-- proses.php-->

 <?php

     <?php
     require_once"kon.php";


     if(isset($_POST['delete_submit'])){

        $idArr = $_POST['checked_id'];
		$foto_lama = $_POST['foto'];

		$files = glob('../images/*'.$foto_lama);
		foreach($files as $file){
			if(is_file($file))
			unlink ($file);
		}


        foreach($idArr as $id){
         mysqli_query($conn,"DELETE FROM data_barang WHERE id=".$id);

		}
echo '<script>';
echo "alert('Removed');";
echo'window.location.href="barang";';
echo "</script>";
    }

    ?>