Laravel 错误编辑器更新

Question

user@user:/opt/lampp/htdocs/gitrepo$ composer update
Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - laravel/framework v5.6.1 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework v5.6.0 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - laravel/framework 5.6.x-dev requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.
    - Installation request for laravel/framework 5.6.* -> satisfiable by laravel/framework[5.6.x-dev, v5.6.0, v5.6.1, v5.6.10, v5.6.11, v5.6.12, v5.6.13, v5.6.14, v5.6.15, v5.6.16, v5.6.17, v5.6.18, v5.6.19, v5.6.2, v5.6.20, v5.6.21, v5.6.22, v5.6.23, v5.6.3, v5.6.4, v5.6.5, v5.6.6, v5.6.7, v5.6.8, v5.6.9].

  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/15-xml.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-dom.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-simplexml.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
    - /etc/php/7.1/cli/conf.d/20-wddx.ini
    - /etc/php/7.1/cli/conf.d/20-xmlreader.ini
    - /etc/php/7.1/cli/conf.d/20-xmlwriter.ini
    - /etc/php/7.1/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

当我尝试更新作曲家时收到此错误。什么解决方案可以解决它？我已经安装了 php7.1，我也安装了 composer (sudo apt-get install composer)

Answer 1

composer install --ignore-platform-reqs \
composer update --ignore-platform-reqs

Answer 2

取消注释后，php.ini file 中的上述扩展名和作曲家无法正常工作。如果遇到以下错误，则需要取消注释php.ini file 中的一些其他扩展。

// Error on the terminal when I ran: composer install

Loading composer repositories with package information
Installing dependencies (including require-dev) from lock file
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - Installation request for league/flysystem 1.0.64 -> satisfiable by league/flysystem[1.0.64].
    - league/flysystem 1.0.64 requires ext-fileinfo * -> the requested PHP extension fileinfo is missing from your system.
  Problem 2
    - league/flysystem 1.0.64 requires ext-fileinfo * -> the requested PHP extension fileinfo is missing from your system.
    - laravel/framework v6.14.0 requires league/flysystem ^1.0.8 -> satisfiable by league/flysystem[1.0.64].
    - Installation request for laravel/framework v6.14.0 -> satisfiable by laravel/framework[v6.14.0].

  To enable extensions, verify that they are enabled in your .ini files:
    - C:\PHP7\php.ini
  You can also run `php --ini` inside terminal to see which files are used by PHP in CLI 
mode.

由于this resource 和others 没有提到PHP7.4 的安装，但您仍然可以关注它们。在我取消注释为mentioned in this article 之后。您还需要取消注释

extension=fileinfo
extension=mbstring // probabily this too

Answer 3

您的包需要一些目前无法找到的依赖项。尝试以下命令并更新作曲家，然后，

sudo apt-get install php7.1-mbstring
sudo service apache2 restart
composer update

Answer 4

由于错误消息“您的系统缺少请求的 PHP 扩展 mbstring。”表明您的系统缺少 PHP 扩展 mbstring。

如果您安装了apt/apt-get，您可以使用搜索扩展名

apt search php7.1-mbstring

要安装它，请使用：

sudo apt install php7.1-mbstring