qrcodejs：根据URL地址生成二维码qrcodejs下载地址：http: davidshimjs github io qrcodejs 用起来很简单，页面中引入两个js：<script type="text javascript" src="https: www tsingfun com statics js jquer qrcodejs下载地址：http://davidshimjs.github.io/qrcodejs/ 用起...

npm安装报错：rollbackFailedOptional verb npm-sessionrollbackFailedOptional-verb-npm-session使用npm install安装组件时报错：rollbackFailedOptional: verb npm-session xxxx原因：组件目标地址无法访问导致，切换npm内网源或国内源即可解决。npm config set regist ...

npm安装报错：rollbackFailedOptional verb npm-sessionrollbackFailedOptional-verb-npm-session使用npm install安装组件时报错：rollbackFailedOptional: verb npm-session xxxx原因：组件目标地址无法访问导致，切换npm内网源或国内源即可解决。npm config set regist ...

npm安装报错：rollbackFailedOptional verb npm-sessionrollbackFailedOptional-verb-npm-session使用npm install安装组件时报错：rollbackFailedOptional: verb npm-session xxxx原因：组件目标地址无法访问导致，切换npm内网源或国内源即可解决。npm config set regist ...

npm安装报错：rollbackFailedOptional verb npm-sessionrollbackFailedOptional-verb-npm-session使用npm install安装组件时报错：rollbackFailedOptional: verb npm-session xxxx原因：组件目标地址无法访问导致，切换npm内网源或国内源即可解决。npm config set regist ...

npm安装报错：rollbackFailedOptional verb npm-sessionrollbackFailedOptional-verb-npm-session使用npm install安装组件时报错：rollbackFailedOptional: verb npm-session xxxx原因：组件目标地址无法访问导致，切换npm内网源或国内源即可解决。npm config set regist ...

php安装gd库扩展（无需源码安装）php_gd_installgd是php图片处理库，网上各种源码安装，非常复杂，其实很简单，无需源码编译。apt install php-gd重启apache生效：systemctl restart apache2gd是php图片处理库，网上各种源码安装，非常复杂，其...

npm安装报错：rollbackFailedOptional verb npm-sessionrollbackFailedOptional-verb-npm-session使用npm install安装组件时报错：rollbackFailedOptional: verb npm-session xxxx原因：组件目标地址无法访问导致，切换npm内网源或国内源即可解决。npm config set regist ...

npm安装报错：rollbackFailedOptional verb npm-sessionrollbackFailedOptional-verb-npm-session使用npm install安装组件时报错：rollbackFailedOptional: verb npm-session xxxx原因：组件目标地址无法访问导致，切换npm内网源或国内源即可解决。npm config set regist ...

npm安装报错：rollbackFailedOptional verb npm-sessionrollbackFailedOptional-verb-npm-session使用npm install安装组件时报错：rollbackFailedOptional: verb npm-session xxxx原因：组件目标地址无法访问导致，切换npm内网源或国内源即可解决。npm config set regist ...