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Composer设置忽略版本匹配的方法,composer匹配
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Composer设置忽略版本匹配的方法,composer匹配

Jun 13, 2016 am 08:40 AM
composer windows Version

Composer设置忽略版本匹配的方法,composer匹配

Composer简介

Composer 是 PHP 的一个依赖管理工具。它允许你申明项目所依赖的代码库,它会在你的项目中为你安装他们。Composer 不是一个包管理器。是的,它涉及 "packages" 和 "libraries",但它在每个项目的基础上进行管理,在你项目的某个目录中(例如 vendor)进行安装。默认情况下它不会在全局安装任何东西。因此,这仅仅是一个依赖管理。

执行composer install遇到错误:Your requirements could not be resolved to an installable set of packages. 这是因为不匹配composer.json要求的版本。

完整错误如下:

vagrant@homestead:/usr/share/nginx/html/laravel-blog$ sudo 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 doctrine/instantiator 1.0.3 -> satisfiable by doctrine/instantiator[1.0.3].
- doctrine/instantiator 1.0.3 requires php ~5.3 -> your PHP version (7.0.3) does not satisfy that requirement.
Problem 2
- doctrine/instantiator 1.0.3 requires php ~5.3 -> your PHP version (7.0.3) does not satisfy that requirement.
- phpunit/phpunit-mock-objects 2.3.0 requires doctrine/instantiator ~1.0,>=1.0.1 -> satisfiable by doctrine/instantiator[1.0.3].
- Installation request for phpunit/phpunit-mock-objects 2.3.0 -> satisfiable by phpunit/phpunit-mock-objects[2.3.0].
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提示我的PHP 7版本太高,不符合composer.json需要的版本,但是在PHP 7下应该也是可以运行的,composer可以设置忽略版本匹配,命令是:

composer install --ignore-platform-reqs
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or

composer update --ignore-platform-reqs
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再次执行composer命令可以正常安装包了。

如果提示警告:

Cannot create cache directory /home/vagrant/.composer/cache/repo/https---packagist.org/, or directory is not writable. Proceeding without cache
Cannot create cache directory /home/vagrant/.composer/cache/files/, or directory is not writable. Proceeding without cache
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这是在虚拟机中执行composer,提示这个目录没有可写权限,composer无法缓存下载的包,这样就每次都得重新下载,把目录改成可写可读即可。

sudo chmod -R 777 /home/vagrant/.composer/cache/files/
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另外,在虚拟机中也设置composer为国内镜像,不然下载速度慢的要死,执行:

composer config -g repo.packagist composer https://packagist.phpcomposer.com
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OK,大功告成。

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