在 ErrorHandler.php 中找不到类“Psr\Log\LogLevel”

Posted 2023-02-16

【中文标题】在 ErrorHandler.php 中找不到类“Psr\\Log\\LogLevel”

【英文标题】：Class 'Psr\Log\LogLevel' not found in ErrorHandler.php在 ErrorHandler.php 中找不到类“Psr\Log\LogLevel”

【发布时间】：2016-03-21 10:12:03

【问题描述】：

使用composer update 或composer install 得到这个错误：

Loading composer repositories with package information
Installing dependencies (including require-dev) from lock file
Nothing to install or update
Generating autoload files
> Incenteev\ParameterHandler\ScriptHandler::buildParameters
Updating the "app/config/parameters.yml" file
> Sensio\Bundle\DistributionBundle\Composer\ScriptHandler::buildBootstrap
> Sensio\Bundle\DistributionBundle\Composer\ScriptHandler::clearCache
php Fatal error:  Class 'Psr\Log\LogLevel' not found in /var/www/html/Project/MRA/vendor/symfony/symfony/src/Symfony/Component/Debug/ErrorHandler.php on line 121
Script Sensio\Bundle\DistributionBundle\Composer\ScriptHandler::clearCache handling the post-install-cmd event terminated with an exception



  [RuntimeException]                                                                                                                                             
  An error occurred when executing the "'cache:clear --no-warmup'" command:                                                                                      
  PHP Fatal error:  Class 'Psr\Log\LogLevel' not found in /var/www/html/Project/MRA/vendor/symfony/symfony/src/Symfony/Component/Debug/ErrorHandler.php on line  
   121                                                                                                                                                           
  .                                                                                                                                                              



install [--prefer-source] [--prefer-dist] [--dry-run] [--dev] [--no-dev] [--no-plugins] [--no-custom-installers] [--no-autoloader] [--no-scripts] [--no-progress] [-v|vv|vvv|--verbose] [-o|--optimize-autoloader] [-a|--classmap-authoritative] [--ignore-platform-reqs] [--] [<packages>]...

我使用的是 symfony 2.7.7，这是我的 composer.json：

"php": ">=5.3.9", "symfony/symfony": "2.7.*", “教义/orm”：“^2.4.8”， "doctrine/doctrine-bundle": "~1.4", "symfony/assetic-bundle": "~2.3", "symfony/swiftmailer-bundle": "~2.3", "symfony/monolog-bundle": "~2.4", “sensio/distribution-bundle”：“~4.0”， “sensio/framework-extra-bundle”：“^3.0.2”， “incenteev/composer-parameter-handler”：“~2.0”， “friendsofsymfony/user-bundle”：“~1.3”， “mopa/bootstrap-bundle”：“dev-master”， "twbs/bootstrap": "^3.3", “knplabs/knp-paginator-bundle”：“dev-master”， “knplabs/knp-menu-bundle”：“2.0.*@dev”， "knplabs/knp-menu": "2.0.*@dev", “craue/formflow-bundle”：“~2.0”， “friendsofsymfony/rest-bundle”：“^1.7”， "sonata-project/admin-bundle": "2.3.*", "sonata-project/doctrine-orm-admin-bundle": "2.3.*", "sonata-project/user-bundle": "dev-master", "sonata-project/datagrid-bundle": "dev-master", "siphoc/pdf-bundle": "1.2.*", “knplabs/knp-snappy-bundle”：“^1.3”， “奏鸣曲项目/easy-extends-bundle”：“^2.1”

【问题讨论】：

rm -rf app/cache/* 激进模式...

您的作曲家文件中应该有这样的一行：“Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::clearCache”。您可以暂时禁用任何 postInstall 脚本以让 composer 完成，然后手动调试自动加载器不工作的原因。

【参考方案1】：

好的，PSR Logger 不在 composer.json 中，所以我添加了 "psr/log": "dev-master" 转换为 composer.json 并修复了错误。 PS：不知道为什么突然没安装就不行了！