Deletion with Php using checkbox with rows named as delete.php

<?php

$username = "328_tahir";
$password = "tahir";
$hostname = "localhost";
//connection to the database
$dbhandle = mysql_connect($hostname, $username, $password)
  or die("Unable to connect to MySQL");
echo "Connected to MySQL now you can create Table new one  <br>";
//select database
mysql_select_db("328_tahir",$dbhandle);
echo "data Base Selected";


 if($_POST['delete']) // from button name="delete"
 {
  $checkbox = $_POST['checkbox']; //from name="checkbox[]"
  $countCheck = count($_POST['checkbox']);
 
  for($i=0;$i<$countCheck;$i++)
  {
   $del_id  = $checkbox[$i];
  
   $sql = "DELETE from products where id = $del_id";
   $result =mysql_query($sql,$dbhandle) or die("cannot delete");
  
  }
 
                 if($result){
    header('Location: index3.php');
   }
   else
   {
    echo "Error: ".mysql_error();
   }
 }
?>