PHPBrew使用variant更新现有安装？
问题描述：
Once you've installed a PHP version using phpbrew install x.x.x, is it possible to add variants afterwards?
使用 phpbrew install xxx code>安装PHP版本后，是否可以 之后添加变体？ p>
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答
Yes, it is possible.
For example, to install mb_string() extenstion use:
phpbrew ext install mbstring
After installation is completed, don't forget to restart fpm with
phpbrew fpm restart
For more information, look here here