Php 如何使用Yi2 basic配置adminlte？

我正在使用yii2基本应用程序。我想要的是我必须用yii2 basic配置adminlte。所以我用了这个作曲家

 composer require dmstr/yii2-adminlte-asset "2.*"

在终端中运行此命令时，我得到以下错误。我不知道是什么

Problem 1
- yiisoft/yii2 2.0.10 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
- yiisoft/yii2 2.0.10 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
- yiisoft/yii2 2.0.10 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
- Installation request for yiisoft/yii2 (locked at 2.0.10, required as ~2.0.5) -> satisfiable by yiisoft/yii2[2.0.10].
To enable extensions, verify that they are enabled in those .ini files:
- /etc/php/7.1/cli/php.ini
- /etc/php/7.1/cli/conf.d/10-opcache.ini
- /etc/php/7.1/cli/conf.d/10-pdo.ini
- /etc/php/7.1/cli/conf.d/20-calendar.ini
- /etc/php/7.1/cli/conf.d/20-ctype.ini
- /etc/php/7.1/cli/conf.d/20-exif.ini
- /etc/php/7.1/cli/conf.d/20-fileinfo.ini
- /etc/php/7.1/cli/conf.d/20-ftp.ini
- /etc/php/7.1/cli/conf.d/20-gettext.ini
- /etc/php/7.1/cli/conf.d/20-iconv.ini
- /etc/php/7.1/cli/conf.d/20-json.ini
- /etc/php/7.1/cli/conf.d/20-phar.ini
- /etc/php/7.1/cli/conf.d/20-posix.ini
- /etc/php/7.1/cli/conf.d/20-readline.ini
- /etc/php/7.1/cli/conf.d/20-shmop.ini
- /etc/php/7.1/cli/conf.d/20-sockets.ini
- /etc/php/7.1/cli/conf.d/20-sysvmsg.ini
- /etc/php/7.1/cli/conf.d/20-sysvsem.ini
- /etc/php/7.1/cli/conf.d/20-sysvshm.ini
- /etc/php/7.1/cli/conf.d/20-tokenizer.ini

您还可以在终端内部运行

php--ini

，查看php在CLI模式下使用的文件

Installation failed, reverting ./composer.json to its original content.

---

我应该安装什么吗。我使用的是linux（ubuntu），php版本是5.6。有人能帮你弄清楚吗？

首先，你需要安装php mbstring软件包。一旦安装并运行composer命令，请确保已在composer.json中添加了所有依赖程序包，否则根据已安装的程序包，您可能会遇到依赖问题。

Mate，上面写着-您需要安装mbstring。执行类似于

sudo apt get install php5.6-mbstring

之类的操作，或者在您的系统上运行的任何操作。我已经安装了它。但是有同样的问题。所以重新启动你的服务器。顺便说一句，您说您正在使用PHP5.6，但Composer在CLI中检测到PHP7.1。检查您的系统配置。我已经检查了系统配置PHP版本5.6.25-2+deb.sury.org~trusty+1Oh，对不起，我没有意识到您刚刚开始进入PHP世界的美丽旅程。请仔细阅读。至于你的最后一个问题，我相信你能从中找到答案