<?php
include_once('config.php');
$id = $_GET['id'];

if ($id == 1) {
    echo ("<script>
            window.alert('Cannot Delete Image One');
            window.location.href='manage-slider.php';
            </script>");
    exit; 
    // Stop further execution
}else{

$query = "DELETE FROM `tbl_slider` WHERE s_id = '{$id}'";
$result = mysqli_query($db, $query) or die("Query Failed");

if ($result) {
    echo ("<script>
            window.alert('Successfully Deleted');
            window.location.href='manage-slider.php';
            </script>");
} else {
    echo "Query not executed";
}
}

?>