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

I got this error when i tried to update composer. what solution can resolve it? i have installed php7.1 and i have installed composer too (sudo apt-get install composer)

Answer 1

Your package need some dependancy that it cannot found currently. Try following commands and update composer then,

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

Answer 2

After uncommenting, the said extensions in php.ini file and the composer doesn't function correctly. if you run into the error below, then you need to uncomment some other extensions in php.ini file .

// 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.

As this resource and others didn't mention the installation for PHP7.4, but you can still follow them. After I uncommented as mentioned in this article . You'll also need to uncomment

extension=fileinfo
extension=mbstring // probabily this too

Answer 3

As the error message " the requested PHP extension mbstring is missing from your system. " states your system is missing the PHP extension mbstring .

If you have apt/apt-get installed you can search for the extension using

apt search php7.1-mbstring

To install it use:

sudo apt install php7.1-mbstring

Answer 4

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