Function Stok Barang

function stokTambah($conn,$pk,$jumlah){

$sql = "update `tb_barang` set `stok`=`stok`+'$jumlah' where `id_barang`='$pk'";

$ubah = process($conn, $sql);

return $ubah;

}

function stokKurang($conn,$pk,$jumlah){

$sql = "update `tb_barang` set `stok`=`stok`-'$jumlah' where `id_barang`='$pk'";

$ubah = process($conn, $sql);

return $ubah;

}