upload gambar

<?php

$server="localhost";
$user="root";
$pass="";

$id_mysql=mysql_connect($server,$user,$pass);
$database=mysql_select_db('cantik',$id_mysql);
$judul=$_POST['judul_gambar'];

//namafolder tidak ada?

$jenis_gambar=$_FILES['nama_file']['type'];
// $judul_gambar=$_POST['judul_gambar'];
if($jenis_gambar=="image/jpeg" || $jenis_gambar=="image/jpg" || $jenis_gambar=="image/gif" || $jenis_gambar=="image/x-png"){
    $gambar = $namafolder . basename($_FILES['nama_file']['name']);
    if (move_uploaded_file($_FILES['nama_file']['tmp_name'], $gambar))
    {
        echo"Gambar berhasil dikirim ".$gambar;
        $sql="insert into tb_gambar (judul_gambar,nama_file)
        values
        ('$judul','$gambar')";
        $res=mysql_query($sql ) or die (mysql_error());
    }else{
        echo "gambar gagal dikirim";
    }

}else{
    echo "extension tidak terbaca";
}
?>
<html>
<body>
<center><h2>Contoh Upload Gambar</h2></center>
<form action="" method="post" enctype="multipart/form-data">
    <p>Judul Gambar</p>
       <input name="judul_gambar" type="text" required="required" id="judul_gambar" size="30" maxlength="30"/>
    <p>File Gambar</p>
      <input name="nama_file" type="file" id="nama_file" size="30"/>
    <br/><input type="submit" name="btnsimpan" id="btnsimpan" value="Simpan"/>
</form>
</body>
</html>