在有人将其记下来进行复制之前。我检查了其他页面，但它们没有帮助。
我正在尝试在 PHP 7.2 上安装 Laravel 6 的软件包。我也尝试过 PHP 7.4。
不幸的是，我收到以下错误：
laravel/framework v6.9.0 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
我已经安装了 mbstring 并在 7.2 和 7.4 的 php.ini 文件中取消注释它：
extension=mbstring
我知道的唯一解决方案是重新启动 apache2 服务器。但我仍然收到错误。
我的composer.json 需要 PHP 7.2。
我还遇到了这些错误：
- Installation request for laravel/framework (locked at v6.9.0, required as ^6.2) -> satisfiable by laravel/framework[v6.9.0].
To enable extensions, verify that they are enabled in your .ini files:
- /etc/php/7.4/cli/php.ini
- /etc/php/7.4/cli/conf.d/10-mysqlnd.ini
- /etc/php/7.4/cli/conf.d/10-opcache.ini
- /etc/php/7.4/cli/conf.d/10-pdo.ini
- /etc/php/7.4/cli/conf.d/15-xml.ini
- /etc/php/7.4/cli/conf.d/20-calendar.ini
- /etc/php/7.4/cli/conf.d/20-ctype.ini
- /etc/php/7.4/cli/conf.d/20-dom.ini
- /etc/php/7.4/cli/conf.d/20-exif.ini
- /etc/php/7.4/cli/conf.d/20-ffi.ini
- /etc/php/7.4/cli/conf.d/20-fileinfo.ini
- /etc/php/7.4/cli/conf.d/20-ftp.ini
- /etc/php/7.4/cli/conf.d/20-gd.ini
- /etc/php/7.4/cli/conf.d/20-gettext.ini
- /etc/php/7.4/cli/conf.d/20-iconv.ini
- /etc/php/7.4/cli/conf.d/20-json.ini
- /etc/php/7.4/cli/conf.d/20-mysqli.ini
- /etc/php/7.4/cli/conf.d/20-pdo_mysql.ini
- /etc/php/7.4/cli/conf.d/20-phar.ini
- /etc/php/7.4/cli/conf.d/20-posix.ini
- /etc/php/7.4/cli/conf.d/20-readline.ini
- /etc/php/7.4/cli/conf.d/20-shmop.ini
- /etc/php/7.4/cli/conf.d/20-simplexml.ini
- /etc/php/7.4/cli/conf.d/20-sockets.ini
- /etc/php/7.4/cli/conf.d/20-sysvmsg.ini
- /etc/php/7.4/cli/conf.d/20-sysvsem.ini
- /etc/php/7.4/cli/conf.d/20-sysvshm.ini
- /etc/php/7.4/cli/conf.d/20-tokenizer.ini
- /etc/php/7.4/cli/conf.d/20-xmlreader.ini
- /etc/php/7.4/cli/conf.d/20-xmlwriter.ini
- /etc/php/7.4/cli/conf.d/20-xsl.ini
You can also run `php --ini` inside terminal to see which files are used by PHP in CLI mode.
请在 Ubuntu 操作系统上运行以下命令。
须藤 apt-get 更新
sudo apt-get install php-mbstring
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