phpweb 会员模块

// 示例代码：使用 bcrypt 加密密码
$password = 'user_password';
$hashedPassword = password_hash($password, PASSWORD_BCRYPT);

// 示例代码：生成并显示验证码
session_start();
$code = rand(1000, 9999);
$_SESSION['captcha'] = $code;

// 显示验证码图片
header('Content-type: image/png');
$image = imagecreatetruecolor(100, 30);
$bgColor = imagecolorallocate($image, 255, 255, 255);
$textColor = imagecolorallocate($image, 0, 0, 0);
imagefilledrectangle($image, 0, 0, 100, 30, $bgColor);
imagestring($image, 5, 30, 8, $code, $textColor);
imagepng($image);
imagedestroy($image);

// 示例代码：权限控制
function checkPermission($userRole, $requiredPermission) {
    $permissions = [
        'admin' => ['create', 'read', 'update', 'delete'],
        'user' => ['read']
    ];
    return isset($permissions[$userRole]) && in_array($requiredPermission, $permissions[$userRole]);
}

$userRole = 'admin';
$requiredPermission = 'create';
if (checkPermission($userRole, $requiredPermission)) {
    // 执行操作
} else {
    // 权限不足
}