在安装Symfony用户捆绑包的朋友时，我遇到了此错误。有人可以帮我解决这个问题吗？
Ahmeds-MBP:placementlink2 ahmed$ composer require friendsofsymfony/user-bundle
Using version ^2.1 for friendsofsymfony/user-bundle
./composer.json has been updated 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
- Conclusion: don't install friendsofsymfony/user-bundle v2.1.2
- Conclusion: don't install friendsofsymfony/user-bundle v2.1.1
- Conclusion: don't install twig/twig v2.5.0
- Conclusion: remove twig/twig v1.23.1
- Conclusion: don't install twig/twig v2.4.8
- Installation request for friendsofsymfony/user-bundle ^2.1 -> satisfiable by friendsofsymfony/user-bundle[v2.1.0, v2.1.1, v2.1.2].
- Conclusion: don't install twig/twig v1.23.1
- friendsofsymfony/user-bundle v2.1.0 requires twig/twig ^1.28 || ^2.0 -> satisfiable by twig/twig[v1.28.0, v1.28.1, v1.28.2, v1.29.0, v1.30.0, v1.31.0, v1.32.0, v1.33.0, v1.33.1, v1.33.2, v1.34.0, v1.34.1, v1.34.2, v1.34.3, v1.34.4, v1.35.0, v1.35.1, v1.35.2, v1.35.3, v1.35.4, v2.0.0, v2.1.0, v2.2.0, v2.3.0, v2.3.1, v2.3.2, v2.4.0, v2.4.1, v2.4.2, v2.4.3, v2.4.4, v2.4.5, v2.4.6, v2.4.7, v2.4.8, v2.5.0].
- Can only install one of: twig/twig[v1.28.0, v1.23.1].
- Can only install one of: twig/twig[v1.28.1, v1.23.1].
- Can only install one of: twig/twig[v1.28.2, v1.23.1].
- Can only install one of: twig/twig[v1.29.0, v1.23.1].
- Can only install one of: twig/twig[v1.30.0, v1.23.1].
- Can only install one of: twig/twig[v1.31.0, v1.23.1].
- Can only install one of: twig/twig[v1.32.0, v1.23.1].
- Can only install one of: twig/twig[v1.33.0, v1.23.1].
- Can only install one of: twig/twig[v1.33.1, v1.23.1].
- Can only install one of: twig/twig[v1.33.2, v1.23.1].
- Can only install one of: twig/twig[v1.34.0, v1.23.1].
- Can only install one of: twig/twig[v1.34.1, v1.23.1].
- Can only install one of: twig/twig[v1.34.2, v1.23.1].
- Can only install one of: twig/twig[v1.34.3, v1.23.1].
- Can only install one of: twig/twig[v1.34.4, v1.23.1].
- Can only install one of: twig/twig[v1.35.0, v1.23.1].
- Can only install one of: twig/twig[v1.35.1, v1.23.1].
- Can only install one of: twig/twig[v1.35.2, v1.23.1].
- Can only install one of: twig/twig[v1.35.3, v1.23.1].
- Can only install one of: twig/twig[v1.35.4, v1.23.1].
- Can only install one of: twig/twig[v2.0.0, v1.23.1].
- Can only install one of: twig/twig[v2.1.0, v1.23.1].
- Can only install one of: twig/twig[v2.2.0, v1.23.1].
- Can only install one of: twig/twig[v2.3.0, v1.23.1].
- Can only install one of: twig/twig[v2.3.1, v1.23.1].
- Can only install one of: twig/twig[v2.3.2, v1.23.1].
- Can only install one of: twig/twig[v2.4.0, v1.23.1].
- Can only install one of: twig/twig[v2.4.1, v1.23.1].
- Can only install one of: twig/twig[v2.4.2, v1.23.1].
- Can only install one of: twig/twig[v2.4.3, v1.23.1].
- Can only install one of: twig/twig[v2.4.4, v1.23.1].
- Can only install one of: twig/twig[v2.4.5, v1.23.1].
- Can only install one of: twig/twig[v2.4.6, v1.23.1].
- Can only install one of: twig/twig[v2.4.7, v1.23.1].
- Installation request for twig/twig (locked at v1.23.1) -> satisfiable by twig/twig[v1.23.1].
Installation failed, reverting ./composer.json to its original content.
这是我的composer.json文件：
"require":{
"php":">=5.5.9",
"symfony/symfony":"3.0.*",
"doctrine/orm":"^2.5",
"doctrine/doctrine-bundle":"^1.6",
"doctrine/doctrine-cache-bundle":"^1.2",
"symfony/swiftmailer-bundle":"^2.3",
"symfony/monolog-bundle":"^2.8",
"sensio/distribution-bundle":"^5.0",
"sensio/framework-extra-bundle":"^3.0.2",
"incenteev/composer-parameter-handler":"^2.0"
},
"require-dev":{
"sensio/generator-bundle":"^3.0",
"symfony/phpunit-bridge":"^2.7"
},
答案 0 :(得分：0)
我为您上面提到的issue做了一些谷歌搜索，似乎有一个错误修正。不幸的是，据我所知，该修复程序尚未移植到3.0版本，因为在发生错误时，不再维护3.0：
Fabien Potencier（fabpot）于2016年10月23日发表评论
哦，我看到您正在使用
Symfony 3.0。不幸的是，由于3.0已不再维护，因此无法正常工作。您需要升级到3.1或使用Twig 1.x。
请按照Fabien的建议进行，您应该摆脱一个问题。
希望这对您有帮助...