kondisikan saja

<?php
// code A
//include("fungsi_koneksi.php");
$host="localhost";
$user="root";
$pass="";
$db="work_mujur";

$mysqli = new mysqli($host, $user, $pass, $db);
if (mysqli_connect_errno()) {
    printf("Connect failed: %s\n", mysqli_connect_error());
    exit();
}
else{
 //echo 'Koneksi berhasil';
 // printf("<br/>Host information: %s\n", $mysqli-> host_info);
}
// end of code A

// code B
$lokasi_file = $_FILES['pp']['tmp_name'];
$tipe_file = $_FILES['pp']['type'];
$nama_file = $_FILES['pp']['name'];
$direktori = "image/$nama_file";
// end of code B

//if (!empty($lokasi_file)) {
$aksi=upload($lokasi_file,$direktori);
if (!$aksi) {
    echo "maaf gagal memasukan gambar";exit();
}
// code C
//$koneksi = koneksi_db();
$sql = "insert into dtimage values (null,'$nama_file')";
//$aksi = mysql_query($sql,$koneksi);
$q=$mysqli->query($sql);
if(!$q){
    echo 'Wrong SQL: ' . $sql . ' Error: ' . $conn->error ;
    exit();
 }
// end of code C

// code D
//if (!$aksi) {
//echo "maaf gagal memasukan gambar";
//}else{
echo "gambar berhasil di upload<br>";
echo "untuk melihatnya silakan klik <a href='view_image.php'>Link ini</a>";
//}
// end of code D