Laravel Composer安装失败，ubuntu中出错

Question

问题1-aws/aws sdk php 3.75的安装请求。0 -

- aws/aws-sdk-php 3.75.0 requires ext-simplexml * -> the requested PHP extension simplexml is missing from your system.

问题2-erusev/parsedown 1.7.1的安装请求-

- erusev/parsedown 1.7.1 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.

问题3-laravel/框架v5.5.43的安装请求-

- laravel/framework v5.5.43 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.

问题4-league/csv 9.1的安装请求。4 -

- league/csv 9.1.4 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.

问题5-nicolaslopezj/search chable 1.10.3的安装请求-

- nicolaslopezj/searchable 1.10.3 requires ext-mbstring * -> the requested PHP extension mbstring is missing from your system.

问题6-phpoffice/phpexcel 1.8的安装请求。1 -

- phpoffice/phpexcel 1.8.1 requires ext-xml * -> the requested PHP extension xml is missing from your system.

- phar-io/manifest 1.0.1 requires ext-dom * -> the requested PHP extension dom is missing from your system.

问题8-phpunit/php代码覆盖率5.3的安装请求。2 -

问题9-phpUnit/phpUnit 6.5.13的安装请求-

- phpunit/phpunit 6.5.13 requires ext-dom * -> the requested PHP extension dom is missing from your system.

问题10-服务器/标记器1.1的安装请求。0 -

- theseer/tokenizer 1.1.0 requires ext-dom * -> the requested PHP extension dom is missing from your system.

问题11-aws/aws sdk PHP3.75。0需要ext simplexml*-

- league/flysystem-aws-s3-v3 1.0.21 requires aws/aws-sdk-php ^3.0.0 -> satisfiable by aws/aws-sdk-php[3.75.0].

- Installation request for league/flysystem-aws-s3-v3 1.0.21 -> satisfiable by league/flysystem-aws-s3-v3[1.0.21].

要启用扩展，请验证它们是否在您的. ini文件中启用：- /etc/php/7.2/cli/php.ini

- /etc/php/7.2/cli/conf.d/10-opcache.ini

- /etc/php/7.2/cli/conf.d/10-pdo.ini

- /etc/php/7.2/cli/conf.d/20-calendar.ini

- /etc/php/7.2/cli/conf.d/20-ctype.ini

- /etc/php/7.2/cli/conf.d/20-exif.ini

- /etc/php/7.2/cli/conf.d/20-fileinfo.ini

- /etc/php/7.2/cli/conf.d/20-ftp.ini

- /etc/php/7.2/cli/conf.d/20-gettext.ini

- /etc/php/7.2/cli/conf.d/20-iconv.ini

- /etc/php/7.2/cli/conf.d/20-json.ini

- /etc/php/7.2/cli/conf.d/20-phar.ini

- /etc/php/7.2/cli/conf.d/20-posix.ini

- /etc/php/7.2/cli/conf.d/20-readline.ini

- /etc/php/7.2/cli/conf.d/20-shmop.ini

- /etc/php/7.2/cli/conf.d/20-sockets.ini

- /etc/php/7.2/cli/conf.d/20-sysvmsg.ini

- /etc/php/7.2/cli/conf.d/20-sysvsem.ini

- /etc/php/7.2/cli/conf.d/20-sysvshm.ini

- /etc/php/7.2/cli/conf.d/20-tokenizer.ini

您还可以在终端中运行php--ini，查看PHP在CLI模式下使用哪些文件。

这个错误是什么意思？我有上面提到的所有扩展都可以在我的php中使用和启用。伊尼。

Answer 1

尝试运行：

sudo apt install php7.2-mbstring php7.2-xml

您的系统中缺少这些扩展，并且/或者它们没有配置为使用php启用。这将在php中安装并启用它们。ini文件。