초보자가 선호하는 간단하고 사용하기 쉬운 PHP 프레임워크

<?php
class User extends CI_Controller {

    public function register()
    {
        // 加载表单验证库
        $this->load->library('form_validation');

        // 设置验证规则
        $this->form_validation->set_rules('username', 'Username', 'required');
        $this->form_validation->set_rules('email', 'Email', 'required|valid_email');
        $this->form_validation->set_rules('password', 'Password', 'required');

        // 如果表单验证通过
        if ($this->form_validation->run() == TRUE)
        {
            // 插入用户数据到数据库
            $data = array(
                'username' => $this->input->post('username'),
                'email' => $this->input->post('email'),
                'password' => $this->input->post('password')
            );

            $this->db->insert('users', $data);

            // 重定向到成功页面
            redirect('user/success');
        }
        else
        {
            // 加载注册视图，显示验证错误
            $this->load->view('user/register');
        }
    }

    public function success()
    {
        // 加载成功视图
        $this->load->view('user/success');
    }
}

<?php
// 表单验证产生的错误消息
$errors = validation_errors();
if (!empty($errors)) {
    echo "<ul>" . $errors . "</ul>";
}
?>

<form action="<?php echo base_url('user/register'); ?>" method="post">
    <input type="text" name="username" placeholder="Username">
    <input type="email" name="email" placeholder="Email">
    <input type="password" name="password" placeholder="Password">
    <input type="submit" value="Register">
</form>

<h1>Registration Successful!</h1>