Home CMS Tutorial DEDECMS What should I do if the dedecms background login verification code is not displayed normally?

What should I do if the dedecms background login verification code is not displayed normally?

Mar 08, 2021 am 10:02 AM
dedecms Backstage Verification code

What should I do if the dedecms background login verification code is not displayed normally?

前言:

在登录dedecms后台时,经常遇到如下三种问题:

1、后台验证码不显示

What should I do if the dedecms background login verification code is not displayed normally?

2、后台验证码不正常显示

What should I do if the dedecms background login verification code is not displayed normally?

3、后台验证码不正常显示

What should I do if the dedecms background login verification code is not displayed normally?

解决方法:

1、取消后台验证码功能

因为没有验证码 不能进后台 所以修改php文件源代码:

方法一:

打开dede/login.php 找到如下代码

if(($validate=='' || $validate != $svali) && preg_match("/6/",$safe_gdopen)){
        ResetVdValue();
        ShowMsg('验证码不正确!','login.php',0,1000);
        exit;
}
Copy after login

第一行替换为 if(false){

好 问题解决 不输验证码后台直接进去

(学习视频分享:php视频教程

方法二:

打开data/safe/inc.safe.config.php

把代码$safe_gdopen = '1,2,3,4,5,6,7'; 中的6,删除即可

Dede后台验证码不显示情况一分析:

验证码需要GD库 请检查你的环境是否开启GD库

Dede后台验证码不显示情况二分析:

验证码只显示背景 不显示字母

打开验证码生成文件 Include/vdimgck.php

找到

for($i=0;$i<$rndcodelen;$i++)
    {
        $bc = mt_rand(0, 1);
        $rndstring[$i] = strtoupper($rndstring[$i]);
        $c_fontColor = $fontColor[mt_rand(0,4)];
        $y_pos = $i==0 ? 4 : $i*($font_size+2);
        $c = mt_rand(0, 15);
        @imagettftext($im, $font_size, $c, $y_pos, 19, $c_fontColor, $font_file, $rndstring[$i]);
        $lastc = $rndstring[$i];
}
Copy after login

Imagettftext()函数没有成功的执行导致了验证码只显示背景,不显示字母

具体原因为 字体文件路径不对.解决方法

1、确认include/data/fonts/ 里面存在字体文件 默认为ggbi.ttf

2、在for($i=0;$i<$rndcodelen;$i++) 上一行 加上如下代码:

$font_file= str_replace("\\","/",$font_file);
Copy after login

即把字体文件路径中反斜杠替换成斜杠 因为我们知道反斜杠有转译字符的功能,

$font_file 路经大体为 盘符:\appserv\www 系统错误的把反斜杠 当作转义用了 导致$font_file也就不是一个路径了 所以Imagettftext()函数总是返回错误

加上$font_file= str_replace("\\","/",$font_file);即可解决

Dede后台验证码不显示情况三分析:

Include/data/words/words.txt 文件不存在  

解决方案:

(1)拷贝一个进去

(2)找到代码    'word_type'  => (int)$safe_codetype,   // 1:数字  2:英文   3:单词

(3)换成'word_type'  =>1  (或2) 既验证码为数字或英文

Dede后台验证码不显示 全部情况解决

如果原来可以显示后来取消验证码后再设置就无法显示,可以通过覆盖data与include目录试试。

相关推荐:织梦cms

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