yii无法安装，提示缺少mbstring(已安装)模块
不知道是怎么回事？网上搜不到答案。
回复内容：
不知道是怎么回事？网上搜不到答案。
一个是cgi，一个是cli。
模块是不一致的。
php -m 查看是否存在模块。
linux可以用php-m | grep module_name
PHP的命令行模式和网页模式使用的是不同的PHP.INI, 所以加载的模块不一定相同
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