Modul Pemrograman Web

Materi PHP

PHP (Hypertext Preprocessor) adalah bahasa pemrograman server-side yang digunakan untuk mengembangkan aplikasi web dinamis. Berikut adalah beberapa konsep dasar dalam PHP:

Contoh Konsep Dasar PHP

1. Variabel


          $x = 5;

          $y = "Hello";

          $z = true;

2. Penggunaan Variabel dalam Teks


          $name = "John";

          echo "Hello, $name!";

3. Struktur Kontrol


          if ($x > 0) {

            echo "Positif";

          } else {

            echo "Negatif";

          }

4. Perulangan


          for ($i = 0; $i < 5; $i++) {

            echo $i;

          }

5. Fungsi


          function greet($name) {

            return "Hello, " . $name . "!";

          }

          $greeting = greet("World");

6. Array


          $numbers = array(1, 2, 3, 4, 5);

          $fruits = ["Apple", "Banana", "Orange"];

7. Pengolahan Form


          <form action="submit.php" method="post">

            <label for="name">Nama:</label>

            <input type="text" id="name"
          name="name"><br>

            <input type="submit" value="Submit">

          </form>

8. Koneksi Database


          $servername = "localhost";

          $username = "username";

          $password = "password";

          $dbname = "myDB";


          // Create connection

          $conn = new mysqli($servername, $username, $password, $dbname);


          // Check connection

          if ($conn->connect_error) {

            die("Connection failed: " . $conn->connect_error);

          }

          echo "Connected successfully";

9. Penggunaan Session


          session_start();

          $_SESSION['user'] = "John";

          echo "Welcome, " . $_SESSION['user'];