How to call verification code in phpcms

How to call verification code in phpcms?

Problem description:

Whether we are making templates for phpcms or doing secondary development of certain functional modules, we often use verification codes in some forms, then Specifically how do we call it?

Solution:

When using verification code in phpcms website, we need to consider two aspects: how to call the verification code in the front-end template page and how to verify in the background program:

1 . In the template, the code for calling the verification code is as follows:

<label for="code">验证码</label>
<input type="text" id="code" name="code" size="10">
{form::checkcode(&#39;code_img&#39;, &#39;4&#39;, &#39;14&#39;, 100, 30)}

Note that from the tag, it can be seen that the checkcode method in the form class is used, so make sure that it has been called in the controller file where the template is located. The calling method of this class is as follows:

pc_base::load_sys_class('form', '', 0);

The file location of this class is /phpcms/libs/classes/form.class.php. You can understand what each parameter represents by looking at the checkcode method parameter comments in this file. significance.

2. In the back-end controller file php program, the demo code is as follows:

defined('IN_PHPCMS') or exit('No permission resources.');
pc_base::load_sys_class('form','', 0);
 
class index {
    public function init(){
    if(isset($_POST['dosubmit'])){ //提交数据
        //启动session
        $session_storage = 'session_'.pc_base::load_config('system','session_storage');
        pc_base::load_sys_class($session_storage);
        //验证码
        if (($_SESSION['code'] != strtolower($_POST['code'])) || empty($_SESSION['code'])) {
        showmessage("验证码错误");
        } else {
        $_SESSION['code'] = '';
        }

Here we pay attention to three points:

Don’t forget the second line Introduce the form class;

Lines 7, 8, and 9, before reading session data, introduce the session storage configuration and startup corresponding class (usually mysql);

Determine the if condition of the session Compare the code value filled in the form with the code value in the session;

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