php 版本：7.4.8 操作系統：免費當我嘗試 localhost/phpmyadmin 時收到此錯誤缺少 mbstring 擴展名。請檢查您的 PHP 配置。我已經安裝了 mbstringsudo apt-get install php-mbstringReading package lists... DoneBuilding dependency tree       Reading state information... Donephp-mbstring is already the newest version (2:7.4+76+ubuntu18.04.1+deb.sury.org+9).0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.sudo apt-get install php7.4-mbstringReading package lists... Done    Building dependency tree           Reading state information... Done    php-mbstring is already the newest version (2:7.4+76+ubuntu18.04.1+deb.sury.org+9).    0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.我也嘗試這個方法我找到了 php.ini我搜索extension=php_mbstring.dll但是 ;extension=php_mbstring.dll 在 php.ini 文件中丟失我怎么解決這個問題？