php if else (dasar programan diskon harga )

<?php
$jumlahbarang = 10;
$harga = array(75000, 85000, 75000 );
$diskon = array(25,50);

if($jumlahbarang > 2){
$hargarealbeli = $harga[1]*$jumlahbarang;
$potongan=(($harga[1]*$diskon[1])/100);
$bayar = $hargarealbeli - $potongan;

// =========================================================

echo "<center>"."<h1>Selamat datang di toko kami</h1>";
echo "<h2>Nama Toko = hipster</h2>";
echo "<h2>Owner     = Puji Ermanto</h2>"."</center><hr>";
// =========================================================


echo "<h3>Harga Barang = ". $harga[1]."</h3>";
echo "<h3>Jumlah yang dibeli = ".$jumlahbarang."<h3>";
echo "<h3>Jumlah Harga Real = ". $hargarealbeli."</h3>";
echo "<h3>dapat diskon sebesar = ".$diskon[1]."%"."</h3>";
echo "<h3>Total Yang Anda Bayar = "."Rp.".$bayar."</h3>";
//*********************************************************

}elseif($jumlahbarang < 2){
$totalbayar = ($harga[0]*$jumlahbarang);

// =========================================================
echo "<center>"."<h1>Selamat datang di toko kami</h1>";
echo "<h2>Nama Toko = hipster</h2>";
echo "<h2>Owner     = Puji Ermanto</h2>"."</center><hr>";
// =========================================================

echo "<h3>maaf anda tidak dapat diskon"."</h3>";
echo "<h3>Harga Barang = ". $harga[0]."</h3>";
echo "<h3>Jumlah yang dibeli = ".$jumlahbarang."</h3>";
echo "<h3>Total Yang Anda Bayar = "."Rp. ". $totalbayar."</h3>";
echo "<h2 class='mamam'>kalo beli lebih dari 2 akan mendapat diskon</h2>";
}else{ $mamam='mamam yuk'; echo $mamam; }
?>

<!DOCTYPE html>
<html lang="en">
<head>
<title>Diskon</title>
<style>
h1{
color : #CC0000;
}
h2{
color : green;
}
h3{
color : blue;
}
h2.mamam{
color : orange;
}
</style>
</head>
<body>

</body>
</html>