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This article introduces the relevant knowledge of "how to deal with the abnormal display of dedecms background login verification code". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Foreword:

When logging in to the dedecms backend, you often encounter the following three problems:

1. The background verification code is not displayed.

2. The background verification code is not displayed properly.

3. The background verification code is not displayed properly.

Solution:

1. Cancel the background verification code function

Because you cannot enter the background without a CAPTCHA, modify the source code of the php file:

Method 1:

Open dede/login.php and find the following code

If (($validate=='' | | $validate! = $svali) & & preg_match ("/ 6 /", $safe_gdopen)) {ResetVdValue (); ShowMsg ('incorrect verification code', 'login.php',0,1000); exit;}

The first line is replaced by if (false) {

Good problem solving. Do not enter the CAPTCHA code and go directly to the backend.

(learn video sharing: php video tutorial)

Method 2:

Open data/safe/inc.safe.config.php

Delete the code $safe_gdopen ='1, 2, 3, 4, 5, 5, 6, 7, 7, 7, 6, 6, 7, 7, 6, 6, 6, 7, 7, 6, 6, 7, 7, 7, 7, 6, 6, 4, 4, 4, 5, 6, 7, 4, 4, 5, 6, 7, 4, 4, 4, 4, 4, 5, 6, 7, 4, 4, 4, 5, 6, 7, 4, 4, 4, 4, 4, 4, 5, 6, 7, 4, 6, 7, 4, 4, 4, 5, 6, 7, 4, 4, 4, 4, 5, 6, 7, 4, 6, 4, 4, 4, 4, 6, 4, 4, 4, 4, 4, 4, 4, 4, 6, 4, 4, 4, 4

Analysis of the situation that the Dede background verification code is not displayed:

CAPTCHA code requires GD library. Please check whether GD library is enabled in your environment.

Analysis of the situation that the Dede background verification code is not displayed:

CAPTCHA shows only the background, not letters.

Open the CAPTCHA generation file Include/vdimgck.php

find

For ($iCAPTA) i1 (or 2) both verification codes are numeric or English

Dede background verification code does not display all cases solved

If you can display the CAPTCHA later and then set it, you can try overwriting the data and include directories.

This is the end of the content of "how to deal with the abnormal display of dedecms background login verification code". Thank you for your reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

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