<?php
	include "koneksi.php";
	session_start();
	$username=$_SESSION['username'];
	$jumlah=$_POST['jumlah'];
	$id=$_POST['id'];

	$query_cek="SELECT * FROM detail where id_produk='$id' AND username='$username' AND proses='cart'";
	$hasil_cek=mysqli_query($koneksi,$query_cek);
	$hasil_cek1=mysqli_query($koneksi,$query_cek);
	$data=mysqli_fetch_array($hasil_cek1);
	$cek=mysqli_num_rows($hasil_cek);
	if ($cek==0) {
		$query="INSERT INTO detail VALUES('','','$jumlah','$id','$username','cart')";
	$hasil=mysqli_query($koneksi,$query);
	if ($hasil) {
		header('location:cart.php');
	} else {
		echo "Gagal beli";
	}
	}else{
		$qty=$data['qty']+$jumlah;
		$query_update="UPDATE detail set qty='$qty' WHERE id_produk='$id' AND username='$username'";
		$hasil_update=mysqli_query($koneksi,$query_update);
	if ($hasil_update) {
		header('location:cart.php');
	} else {
		echo "Gagal beli";
	}
	}

 ?>