第一按照官网安装 ：
https://symfony.com/doc/current/bundles/FOSUserBundle/index.html#main
可能版本无法安装 ：
$ composer require friendsofsymfony/user-bundle "~1.3" ./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 v1.3.7 - Conclusion: don't install friendsofsymfony/user-bundle v1.3.6 - Conclusion: don't install friendsofsymfony/user-bundle v1.3.5 - Conclusion: don't install friendsofsymfony/user-bundle v1.3.4 - Conclusion: don't install friendsofsymfony/user-bundle v1.3.3 - Conclusion: don't install friendsofsymfony/user-bundle v1.3.2 - Conclusion: don't install friendsofsymfony/user-bundle v1.3.1 - Conclusion: remove symfony/symfony v3.2.7 - Installation request for friendsofsymfony/user-bundle ~1.3 -> satisfiable by friendsofsymfony/user-bundle[v1.3.0, v1.3.1, v1.3.2, v1 - Conclusion: don't install symfony/symfony v3.2.7 - friendsofsymfony/user-bundle v1.3.0 requires symfony/security-bundle 2.1.* -> satisfiable by symfony/security-bundle[v2.1.0, v2.1.1, 2, v2.1.3, v2.1.4, v2.1.5, v2.1.6, v2.1.7, v2.1.8, v2.1.9]. - don't install symfony/security-bundle v2.1.0|don't install symfony/symfony v3.2.7 - don't install symfony/security-bundle v2.1.1|don't install symfony/symfony v3.2.7 - don't install symfony/security-bundle v2.1.10|don't install symfony/symfony v3.2.7 - don't install symfony/security-bundle v2.1.11|don't install symfony/symfony v3.2.7 - don't install symfony/security-bundle v2.1.12|don't install symfony/symfony v3.2.7 - don't install symfony/security-bundle v2.1.13|don't install symfony/symfony v3.2.7 - don't install symfony/security-bundle v2.1.2|don't install symfony/symfony v3.2.7 - don't install symfony/security-bundle v2.1.3|don't install symfony/symfony v3.2.7 - don't install symfony/security-bundle v2.1.4|don't install symfony/symfony v3.2.7 - don't install symfony/security-bundle v2.1.5|don't install symfony/symfony v3.2.7 - don't install symfony/security-bundle v2.1.6|don't install symfony/symfony v3.2.7 - don't install symfony/security-bundle v2.1.7|don't install symfony/symfony v3.2.7 - don't install symfony/security-bundle v2.1.8|don't install symfony/symfony v3.2.7 - don't install symfony/security-bundle v2.1.9|don't install symfony/symfony v3.2.7 - Installation request for symfony/symfony (locked at v3.2.7, required as 3.2.*) -> satisfiable by symfony/symfony[v3.2.7]. Installation failed, reverting ./composer.json to its original content.
那么执行以下命令安装：
composer require friendsofsymfony/user-bundle "~2.0@dev"
composer require friendsofsymfony/user-bundle "~2.0@dev" ./composer.json has been updated Loading composer repositories with package information Updating dependencies (including require-dev) Package operations: 1 install, 0 updates, 0 removals - Installing friendsofsymfony/user-bundle (dev-master 0e41213) Cloning 0e412131e5 Writing lock file Generating autoload files > IncenteevParameterHandlerScriptHandler::buildParameters Updating the "app/config/parameters.yml" file > SensioBundleDistributionBundleComposerScriptHandler::buildBootstrap > SensioBundleDistributionBundleComposerScriptHandler::clearCache // Clearing the cache for the dev environment with debug true [OK] Cache for the "dev" environment (debug=true) was successfully cleared. > SensioBundleDistributionBundleComposerScriptHandler::installAssets Trying to install assets as relative symbolic links. -- -------- ---------------- Bundle Method / Error -- -------- ---------------- [OK] All assets were successfully installed. > SensioBundleDistributionBundleComposerScriptHandler::installRequirementsFile > SensioBundleDistributionBundleComposerScriptHandler::prepareDeploymentTarget