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Editor to share with you the method of phpcms to call CAPTCHA, I hope you will learn a lot after reading this article, let's discuss it together!

How does phpcms call CAPTCHA?

Problem description:

Whether in the template production of phpcms or the secondary development of some functional modules, we often use the CAPTCHA in some forms, so how do we call it?

Solution:

To use CAPTCHA in phpcms website, we need to consider two aspects: how to call CAPTCHA in the front-end template page and how to verify it in the background program:

1. In the template, the code that calls the verification code is as follows:

CAPTCHA {form::checkcode ('code_img',' 4,'14, 100,30)}

Note that the checkcode method in the form class is used from the tag, so make sure that the class has been called in the controller file where the template is located, as follows:

Pc_base::load_sys_class ('form',', 0)

This type of file location / phpcms/libs/classes/form.class.php, you can see the meaning of each parameter by looking at the checkcode method parameter comments in this file.

2. In the back-end controller file php program, the demonstration 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'])) {/ / submit data / / launch session $session_storage = 'session_'.pc_base::load_config (' system','session_storage') Pc_base::load_sys_class ($session_storage); / / CAPTCHA if (($_ SESSION ['code']! = strtolower ($_ POST [' code'])) | | empty ($_ SESSION ['code']) {showmessage ("CAPTCHA error");} else {$_ SESSION [' code'] =';}

Here we pay attention to three points:

Second line, don't forget to introduce the form class

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

Judge the if condition of session to compare the code value filled in the form with the code value in session

After reading this article, I believe you have a certain understanding of the method of phpcms to call CAPTCHA, want to know more about it, welcome to follow the industry information channel, thank you for reading!

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