phpMyAdmin出现无法载入 mcrypt 扩展,请检查PHP配置的解决方法_php技巧
1、没有正确安装Mysql数据库，在系统服务中Mysql相关的服务没有启动 （请查看正确安装Mysql的方法）
2、在系统的 system32（C:\windows\system32） 目录下缺少 libmcrypt.dll文件，解决方法是找到php目录下的libmcrypt.dll，并将libmcrypt.dll复制到C:\windows\system32目录中，然后重新启动Web服务。
3、在C:\windows目录下的php.ini文件中，没有将“;extension=php_mcrypt.dll”中的前面一个“;”去掉，所以不能使用相应功能，解决方法是打开php.ini文件
找到
;extension=php_mcrypt.dll
改成
extension=php_mcrypt.dll //去掉前面的;使之生效
4、Mysql目录没有读取权限，正确的目录权限如下：
administrator 完全控制
system 完全控制
user 读取加运行
其他的用户权限全部删除（也可保留，但安全性不高，建议删除），然后重启MYsql服务和Web服务（建议修改此项后重启一下服务器）
当你试过所有办法之后还是不行,其实还有一步,网上很少有说,解决办法,我的是2003+IIS+PHP5+MYSQL5
桌面>我的电脑>右键属性>高级>环境变量>系统变量>新建
名：phprc
值：c:\php(你的PHP在什么目录就是什么)
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