错误：您的要求无法解析为一组可安装的软件包。拉拉维尔答案

【问题标题】：Error: Your requirements could not be resolved to an installable set of packages. Laravel错误：您的要求无法解析为一组可安装的软件包。拉拉维尔
【发布时间】：2020-06-24 10:23:54
【问题描述】：

我已经有 Composer 版本 @ package_branch_alias_version @ (1.0.0-beta2) 和 Laravel Installer 2.1.0。但是当我想做一个 laravel 项目时，它会显示如下错误：

Problem 1
    - Installation request for phpdocumentor/reflection-docblock 5.1.0 -> satisfiable by phpdocumentor/reflection-docblock[5.1.0].
    - phpdocumentor/reflection-docblock 5.1.0 requires ext-filter ^7.1 -> the requested PHP extension filter has the wrong version (7.2.23-1+ubuntu16.04.1+deb.sury.org+1) installed.
  Problem 2
    - phpdocumentor/reflection-docblock 5.1.0 requires ext-filter ^7.1 -> the requested PHP extension filter has the wrong version (7.2.23-1+ubuntu16.04.1+deb.sury.org+1) installed.
    - phpspec/prophecy v1.10.3 requires phpdocumentor/reflection-docblock ^2.0|^3.0.2|^4.0|^5.0 -> satisfiable by phpdocumentor/reflection-docblock[5.1.0].
    - Installation request for phpspec/prophecy v1.10.3 -> satisfiable by phpspec/prophecy[v1.10.3].

  To enable extensions, verify that they are enabled in those .ini files:
    - /etc/php/7.2/cli/php.ini
    - /etc/php/7.2/cli/conf.d/10-mysqlnd.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/15-xml.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-curl.ini
    - /etc/php/7.2/cli/conf.d/20-dom.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-gd.ini
    - /etc/php/7.2/cli/conf.d/20-gettext.ini
    - /etc/php/7.2/cli/conf.d/20-gmp.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-mbstring.ini
    - /etc/php/7.2/cli/conf.d/20-mysqli.ini
    - /etc/php/7.2/cli/conf.d/20-pdo_mysql.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-simplexml.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
    - /etc/php/7.2/cli/conf.d/20-wddx.ini
    - /etc/php/7.2/cli/conf.d/20-xmlreader.ini
    - /etc/php/7.2/cli/conf.d/20-xmlwriter.ini
    - /etc/php/7.2/cli/conf.d/20-xsl.ini
    - /etc/php/7.2/cli/conf.d/20-zip.ini
  You can also run `php --ini` inside terminal to see which files are used by PHP in CLI mode.

我该怎么办？我在互联网上搜索了解决方案，但没有找到相同的解决方案。

【问题讨论】：

解决了，伙计们。我卸载了 composer 1.0.0 并安装了 composer 1.10.0

标签： php laravel composer-php

【解决方案1】：

如果您想使用这些软件包，请使用 PHP 7.1。请记住，您至少应该升级到 php 7.3。

【讨论】：

【解决方案2】：

根据phpdocumentor 文档。它至少需要PHP 7.2。要解决这个问题upgrade your PHP version 或downgrade phpdocumentor package

requires

php: ^7.2
phpdocumentor/type-resolver: ^1.0
webmozart/assert: ^1
phpdocumentor/reflection-common: ^2.0
ext-filter: ^7.1

https://packagist.org/packages/phpdocumentor/reflection-docblock#5.1.0

【讨论】：

@Stev 尝试使用PHP 7.1