PHP 関数の安全性とコードの可読性および保守性の間のトレードオフ

function sanitizeInput($input) {
    $sanitizedInput = htmlspecialchars($input);
    return $sanitizedInput;
}

if (isset($_POST['username']) && !empty($_POST['username'])) {
    $username = $_POST['username'];
} else {
    $username = '';
}

$username = isset($_POST['username']) && !empty($_POST['username']) ? $_POST['username'] : '';

function encryptPassword($password) {
    $encryptedPassword = password_hash($password, PASSWORD_DEFAULT);
    return $encryptedPassword;
}

function formatDate($timestamp) {
    $formattedDate = date('Y-m-d', $timestamp);
    return $formattedDate;
}

function processFormInput($input) {
    // 验证 username 输入
    $username = sanitizeInput($input['username']);
    if (empty($username)) {
        throw new Exception('Username cannot be empty');
    }

    // 验证 password 输入
    $password = sanitizeInput($input['password']);
    if (empty($password)) {
        throw new Exception('Password cannot be empty');
    }

    // 验证 email 输入
    $email = sanitizeInput($input['email']);
    if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
        throw new Exception('Invalid email address');
    }

    // ... 处理其他输入（如果需要）

    // 返回验证后的输入
    return [
        'username' => $username,
        'password' => $password,
        'email' => $email
    ];
}