Untitled

5.

<?php
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $n = $_POST['n'];
    $s1 = $_POST['s1'];
    $s2 = $_POST['s2'];
    $s3 = $_POST['s3'];

    setcookie('n', $n);
    setcookie('s1', $s1);
    setcookie('s2', $s2);
    setcookie('s3', $s3);

    header("Location: next_page.php");
    exit;
}
?>

<!DOCTYPE html>
<html>
<head>
    <title>Student Information</title>
</head>
<body>
    <h1>Student Information</h1>
    <form method="POST" action="<?php echo $_SERVER['PHP_SELF']; ?>">
        <label for="n">Name:</label>
        <input type="text" name="n" id="n" required><br><br>
        <label for="s1">Subject 1:</label>
        <input type="number" name="s1" id="s1" required><br><br>
        <label for="s2">Subject 2:</label>
        <input type="number" name="s2" id="s2" required><br><br>
        <label for="s3">Subject 3:</label>
        <input type="number" name="s3" id="s3" required><br><br>
        <input type="submit" value="Submit">
    </form>
</body>
</html>


next_page.php

<?php
$cookies = ['n', 's1', 's2', 's3'];
foreach ($cookies as $cookie) {
    if (isset($_COOKIE[$cookie])) {
        echo $_COOKIE[$cookie] . "<br>";
    }
}
?>


=====================================================================================


6.

<?php
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $input = $_POST['input'];
    $numbers = explode(',', $input);
    $sum = 0;
    $product = 1;
    $primeCount = 0;
    foreach ($numbers as $number) {
        $number = intval($number);
        if ($number % 2 === 0) {
            $sum += $number;
        }
        if ($number % 2 !== 0) {
            $product *= $number;
        }
        if (isPrime($number)) {
            $primeCount++;
        }
    }
    setcookie('sum', $sum);
    setcookie('product', $product);
    setcookie('primeCount', $primeCount);
    header('Location: p6.php');
    exit;
}
function isPrime($number) {
    if ($number < 2) {
        return false;
    }
    for ($i = 2; $i <= sqrt($number); $i++) {
        if ($number % $i === 0) {
            return false;
        }
    }
    return true;
}
?>
<!DOCTYPE html>
<html>
<head>
    <title>Variable Length Arguments</title>
</head>
<body>
    <h1>Variable Length Arguments</h1>
    <form method="POST" action="">
        <label for="input">Enter a comma separated string:</label>
        <input type="text" name="input" id="input" required>
        <button type="submit">Submit</button>
    </form>
    <?php
    if (isset($_COOKIE['sum']) && isset($_COOKIE['product']) && isset($_COOKIE['primeCount'])) {
        echo '<h2>Previous Results:</h2>';
        echo 'Sum: ' . $_COOKIE['sum'] . '<br>';
        echo 'Product: ' . $_COOKIE['product'] . '<br>';
        echo 'Prime Count: ' . $_COOKIE['primeCount'] . '<br>';
    }
    ?>
</body>
</html>