Membuat kalkulator sederhana dengan PHP

Mungkin dari kemain-kemarin bosen ya bikin program pakai JAVA. Sekarang kita coba bikin program sederhana kalkulator dengan PHP yuk. Eits...PHP itu adalah sebuah bahasa pemrograman ya bukan singkatan dari Pemberi Harapan Palsu loh.
Disini kita hanya membutuhkan index.php dan css


Ini bagian index nya (jangan lupa save dengan type file .php)

<!DOCTYPE html>
<html>
<head>
                <title>Membuat Kalkulator Sederhana Dengan PHP</title>
                <link rel="stylesheet" type="text/css" href="style.css">
</head>
<body>
                <?php
                if(isset($_POST['hitung'])){
                                $bil1 = $_POST['bil1'];
                                $bil2 = $_POST['bil2'];
                                $operasi = $_POST['operasi'];
                                switch ($operasi) {
                                                case 'tambah':
                                                                $hasil = $bil1+$bil2;
                                                break;
                                                case 'kurang':
                                                                $hasil = $bil1-$bil2;
                                                break;
                                                case 'kali':
                                                                $hasil = $bil1*$bil2;
                                                break;
                                                case 'bagi':
                                                                $hasil = $bil1/$bil2;
                                                break;                                  
                                }
                }
                ?>
                <div class="kalkulator">
                                <h2 class="judul">KALKULATOR</h2>
                                <form method="post" action="index.php">                                      
                                                <input type="text" name="bil1" class="bil" autocomplete="off" placeholder="Masukkan Bilangan Pertama">
                                                <input type="text" name="bil2" class="bil" autocomplete="off" placeholder="Masukkan Bilangan Kedua">
                                                <select class="opt" name="operasi">
                                                                <option value="tambah">+</option>
                                                                <option value="kurang">-</option>
                                                                <option value="kali">x</option>
                                                                <option value="bagi">/</option>
                                                </select>
                                                <input type="submit" name="hitung" value="Hitung" class="tombol">                                                                                                                                                                
                                </form>
                                <?php if(isset($_POST['hitung'])){ ?>
                                                <input type="text" value="<?php echo $hasil; ?>" class="bil">
                                <?php }else{ ?>
                                                <input type="text" value="0" class="bil">
                                <?php } ?>                                         
                </div>
</body>
</html>


 Lalu sekarang masukkan cssnya bisa kalian beri nama style.css

body{
                background: #F2F2F2;
                font-family: sans-serif;
}

.kalkulator{
                width: 335px;
                background: #2F495A;
                margin: 100px auto;
                padding: 10px 20px 50px 20px;
                border-radius: 5px;
                box-shadow: 0px 10px 20px 0px #D1D1D1;
}

.bil{
                width: 300px;
                margin: 5px;
                border: none;
                font-size: 16pt;
                border-radius: 5px;
                padding: 10px; 
}

.opt{
                font-size: 16pt;
                border: none;
                width: 215px;
                margin: 5px;
                border-radius: 5px;
                padding: 10px;
}

.tombol{
                background: #EC5159;
                border-top: none;
                border-right: none;
                border-left: none;
                border-radius: 5px;
                padding: 10px 20px;
                color: #eee;
                font-size: 15pt;
                border-bottom:4px solid #BF3D3D;
}

.brand{
                color: #eee;
                font-size: 11pt;
                float: right;
                text-decoration: none;
                margin: 12px;
}

.judul{
                text-align: center;
                color: #eee;
                font-weight: normal;
}

Setelah kita jalankan tampilannya seperti ini. 



cukup mudah kan buat pemula. selamat mengutak-atik ya

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