perbaikan

<?php
if (isset($_POST['bts'])){
    $nama_foto=$_FILES['foto']['name'];
    // Simpan ke Database
/*
tulis dgn lengkap fieldnya jgn langsung tembak
*/
    $sql="insert into slider
(judul, keterangan, nama_foto)
values
('".$_POST['judul']."','".$_POST['keterangan']."','$nama_foto')";
    $query = mysqli_query($con,$sql);
/*
jgn proses sebelum yakin querynya masuk
*/
    if($query){
    // Simpan di Folder Gambar
        copy($_FILES['foto']['tmp_name'], "images/".$_FILES['foto']['name']);
    }else{}

    if ($query) {
        echo "<div class='alert alert-success' role='alert'><span class='glyphicon glyphicon-ok-circle'></span> Data Berhasil disimpan</div>";
    } else {
        echo "<div class='alert alert-danger' role='alert'><span class='glyphicon glyphicon-remove-circle'></span> Gagal!</div>".mysqli_error();
    }
    mysqli_close($con);
}
?>