Composer常见错误解决方案
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:
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vagrant@homestead:/usr/share/nginx/html/laravel-blog$ sudocomposerinstall Loadingcomposerrepositorieswithpackage information Installingdependencies (includingrequire-dev) fromlockfile Yourrequirementscouldnot beresolvedto aninstallablesetofpackages. Problem 1 - Installationrequestfor doctrine/instantiator 1.0.3 -> satisfiablebydoctrine/instantiator[1.0.3]. - doctrine/instantiator 1.0.3 requiresphp ~5.3 -> yourPHPversion (7.0.3) doesnot satisfythatrequirement. Problem 2 - doctrine/instantiator 1.0.3 requiresphp ~5.3 -> yourPHPversion (7.0.3) doesnot satisfythatrequirement. - phpunit/phpunit-mock-objects 2.3.0 requiresdoctrine/instantiator ~1.0,>=1.0.1 -> satisfiablebydoctrine/instantiator[1.0.3]. - Installationrequestfor phpunit/phpunit-mock-objects 2.3.0 -> satisfiablebyphpunit/phpunit-mock-objects[2.3.0]. |
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:
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composerinstall --ignore-platform-reqs |
或者
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composerupdate --ignore-platform-reqs |
再次执行composer命令可以正常安装包了。
如果提示警告:
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Cannotcreatecachedirectory /home/vagrant/.composer/cache/repo/https---packagist.org/, or directoryis not writable. Proceedingwithoutcache Cannotcreatecachedirectory /home/vagrant/.composer/cache/files/, or directoryis not writable. Proceedingwithoutcache |
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。
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sudo chmod -R 777 /home/vagrant/.composer/cache/files/ |
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:
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composerconfig -g repo.packagistcomposerhttps: //packagist.phpcomposer.com
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