dikiwidia/fungsi.php

## fungsi.php
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Belajar Fungsi</title>
</head>
<body>
    <form action="<?php $_SERVER['PHP_SELF'] ?>" method="post" autocomplete="off">
        <p>Panjang</p>
        <input type="text" name="p">
        <p>Lebar</p>
        <input type="text" name="l">
        <br><br>
        <button type="submit">Hitung</button>
    </form>
    <br>

<?php
$panjang = $_POST['p'];
$lebar = $_POST['l'];

echo "Hasil: ".hitungLuas($panjang,$lebar);

function hitungLuas($panjang,$lebar){
    return $panjang * $lebar;
}
?>
</body>
</html>
	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<title>Belajar Fungsi</title>
	</head>
	<body>
	<form action="<?php $_SERVER['PHP_SELF'] ?>" method="post" autocomplete="off">
	<p>Panjang</p>
	<input type="text" name="p">
	<p>Lebar</p>
	<input type="text" name="l">
	<br><br>
	<button type="submit">Hitung</button>
	</form>
	<br>

	<?php
	$panjang = $_POST['p'];
	$lebar = $_POST['l'];

	echo "Hasil: ".hitungLuas($panjang,$lebar);

	function hitungLuas($panjang,$lebar){
	return $panjang * $lebar;
	}
	?>
	</body>
	</html>