Codeigniter captcha
Codeigniter captcha
提问于 2012-05-29 19:35:18
我遇到了一个小问题，我想不通了。
我想使用没有数据库的验证码助手，但似乎没有什么工作。
在构造中，我创建了一个变量，它生成一个随机字符串
public function __construct()
{
parent::__construct();
$this->rand = random_string('numeric', 4);
}将此变量传递给captcha值，如下所示：
$vals = array(
'word' => $this->rand,
'img_path' => './captcha/',
'img_url' => base_url() . 'captcha/',
'font_path' => './system/fonts/texb.ttf',
'img_width' => '150',
'img_height' => 30,
'expiration' => 7200
);
$cap = create_captcha($vals);我想用回调函数来验证它，如下所示
function captcha_check()
{
if($this->input->post('code') != $this->rand)
{
$this->form_validation->set_message('captcha_check', 'Wrong captcha code, hmm are you the Terminator?');
return false;
}
}而且什么都不起作用，问题是，验证码是与图像一起显示的，问题是验证，如果我在验证码字段中键入正确的数字，它总是显示错误，无论我键入的是什么，请谁给我一个提示？
html：
<label for="code">Count please </label>
<?php echo $rand; ?>
<input type="text" id="code" name="code" class="span3" />验证行：
$this->form_validation->set_rules('code', 'Captcha', 'required|callback_captcha_check');回答 4
Stack Overflow用户
回答已采纳
发布于 2012-05-29 19:44:10
像这样修改你的回调函数：
function captcha_check()
{
if($this->input->post('code') != $this->rand)
{
$this->form_validation->set_message('captcha_check', 'Wrong captcha code, hmm are you the Terminator?');
return false;
}
return true;
}编辑：
您需要将此行$this->rand = random_string('numeric', 4);移出构造函数，因为在控制器的每次加载时，它都会生成一个新字符串，从而导致验证码初始加载和验证码的值不同。只需将其放在$vals初始化之前。
Stack Overflow用户
发布于 2012-10-19 16:00:05
* Example of captcha validation without database
* 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;
}
}Stack Overflow用户
发布于 2013-05-07 21:14:38
$vals = array(
'word' => $this->rand,
'img_path' => './captcha/',
'img_url' => base_url() . 'captcha/',
'font_path' => './system/fonts/texb.ttf',
'img_width' => '150',
'img_height' => 30,
'expiration' => 7200
);
$cap = create_captcha($vals);
$this->session->set_userdata($cap);
function captcha_check()
{
if($this->input->post('code') == $this->session->userdata('word'))
{
return true;
}else{
$this->form_validation->set_message('captcha_check', 'Wrong captcha code, hmm are you the Terminator?');
return false;
}
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/10798333
复制相关文章
相似问题
腾讯云开发者
Copyright © 2013 - 2026 Tencent Cloud. All Rights Reserved. 腾讯云 版权所有
深圳市腾讯计算机系统有限公司 ICP备案/许可证号：粤B2-20090059 
粤公网安备44030502008569号
腾讯云计算（北京）有限责任公司 京ICP证150476号 | 京ICP备11018762号