CodeIgniter验证码

non_et 发布于 2019-01-11 captcha 最后更新 2019-01-11 22:59 25 浏览

我创建了一些用于将数据插入数据库并检查数据是否从人发送的表单。我已经使用了已经集成到CI中的CAPTCHA。 这是我的控制器:

    $checkrules = array(
        'img_path' => realpath(APPPATH . '../upload/checking/img') . '/',
        'img_url' => base_url() . 'upload/checking/img/',
        'font_path' => realpath(APPPATH . '../upload/checking/font.ttf'),
        'img_width' => 150,
        'img_height' => 30,
        'expiration' => 7200
    );
$check = create_captcha($checkrules);
    $data['checkimg'] = $check['image'];
$this->form_validation->set_rules('name', 'Name', 'required|max_length[40]|xss_clean');
    $this->form_validation->set_rules('email', 'E-mail', 'required|valid_email|xss_clean');
    $this->form_validation->set_rules('website', 'Website', 'max_length[80]|prep_url|xss_clean');
    $this->form_validation->set_rules('comment', 'Comment', 'required|xss_clean');
    $this->form_validation->set_rules('check', 'Check', 'required|xss_clean');
if ($this->form_validation->run() == FALSE)
    {
        $this->load->view('cms/theme', $data);
    }
    else
    {
        echo "success";
        $this->load->view('cms/theme', $data);
    }
我现在的问题是验证CAPTCHA的最佳方式是什么? 1.)创建回调,我已经做了,但有问题,因为当我发送表单是新的CAPTCHA代码错误。 2.)将CAPTCHA的代码插入数据库并从中检查。问题是因为会有很多的加载数据库,它会很忙。 第二个问题。这个CAPTCHA只保存文件夹中的.jpg图片,或者它可以是其他任何格式的文件? (我问这是因为我想在使用它们之后删除这个验证码。)
已邀请:

iaut

赞同来自:

 * Example of captcha validation without database useage
 * Instead of it used session to store captcha value
 * The images will be deleted after the use

public function index()
{   
    $this->load->helper(array('form', 'url','captcha'));
    $this->load->library('form_validation');
$this->form_validation->set_error_delimiters('<div class="error">', '</div>');
       $this->form_validation->set_rules('username', 'Username', 'trim|required|xss_clean');
       $this->form_validation->set_rules('password', 'Password', 'trim|required|xss_clean|callback_check_database');
       $this->form_validation->set_rules('captcha', 'Captcha', 'callback_validate_captcha');
if($this->form_validation->run() == FALSE)
       {
$original_string = array_merge(range(0,9), range('a','z'), range('A', 'Z'));
        $original_string = implode("", $original_string);
        $captcha = substr(str_shuffle($original_string), 0, 6);
//Field validation failed.  User redirected to login page
        $vals = array(
                'word' => $captcha,
                'img_path' => './captcha/',
                'img_url' => 'http://mycodeignitor.org/captcha/',
                'font_path' => BASEPATH.'fonts/texb.ttf',
                'img_width' => 150,
                'img_height' => 50,
                'expiration' => 7200
        );
$cap = create_captcha($vals);
        $data['image'] = $cap['image'];
if(file_exists(BASEPATH."../captcha/".$this->session->userdata['image']))
            unlink(BASEPATH."../captcha/".$this->session->userdata['image']);
$this->session->set_userdata(array('captcha'=>$captcha, 'image' => $cap['time'].'.jpg'));
        $this->load->view('index_index',$data);
       }
       else
       {
            if(file_exists(BASEPATH."../captcha/".$this->session->userdata['image']))
                unlink(BASEPATH."../captcha/".$this->session->userdata['image']);
$this->session->unset_userdata('captcha');
            $this->session->unset_userdata('image');
            redirect('home', 'refresh');
       }
}
public function validate_captcha(){
    if($this->input->post('captcha') != $this->session->userdata['captcha'])
    {
        $this->form_validation->set_message('validate_captcha', 'Wrong captcha code, hmm are you the Terminator?');
        return false;
    }else{
        return true;
    }
}

pquis

赞同来自:

我建议你使用recaptcha,它很容易在codeigniter中实现:http://codeigniter.com/wiki/ReCAPTCHA