从symfony 2.1.7升级到symfony 2.1.8

我运行了composer update命令，它从symfony 2.1.7更新为symfony 2.1.8。这就是我的问题开始的地方。现在，当我尝试运行任何symfony控制台命令时，我得到如下错误：

 Fatal error: Class 'Symfony\Component\Console\Input\ArgvInput' not found in C:\xampp\htdocs\myproject\app\console on line 16

当我在浏览器中运行项目时，会出现以下错误：

Fatal error: Class 'Symfony\Component\ClassLoader\DebugClassLoader' not found in C:\xampp\htdocs\myproject\app\bootstrap.php.cache on line 542

以前一切正常

我该如何解决这个问题

这是我的composer.json：

{
"name": "symfony/framework-standard-edition",
"description": "The \"Symfony Standard Edition\" distribution",
"autoload": {
    "psr-0": { "": "src/" }
},
"require": {
    "php": ">=5.3.3",
    "symfony/symfony": "2.1.7",
    "imagine/Imagine": ">=0.2.8",
    "liip/imagine-bundle": "*@dev",
    "knplabs/knp-paginator-bundle": "dev-master",
    "cbsi/doctrine2-nestedset": "dev-master",
    "exercise/htmlpurifier-bundle": "dev-master",
    "doctrine/orm": ">=2.2.3,<2.4-dev",
    "doctrine/doctrine-bundle": "1.0.*",
    "twig/extensions": "1.0.*@dev",
    "symfony/assetic-bundle": "2.1.*",
    "symfony/swiftmailer-bundle": "2.1.*",
    "symfony/monolog-bundle": "2.1.*",
    "sensio/distribution-bundle": "2.1.*",
    "sensio/framework-extra-bundle": "2.1.*",
    "sensio/generator-bundle": "2.1.*",
    "jms/security-extra-bundle": "1.2.*",
    "jms/di-extra-bundle": "1.1.*",
    "kriswallsmith/assetic": "1.1.*@dev"
},
"scripts": {
    "post-install-cmd": [
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::buildBootstrap",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::clearCache",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installAssets",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installRequirementsFile"
    ],
    "post-update-cmd": [
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::buildBootstrap",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::clearCache",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installAssets",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installRequirementsFile"
    ]
},
"extra": {
    "symfony-app-dir": "app",
    "symfony-web-dir": "web"
}
}

{
“名称”：“symfony/framework标准版”，
“说明”：“Symfony标准版”发行版，
“自动加载”：{
“psr-0”：{”“：“src/”}
},
“要求”：{
“php”：“>=5.3.3”，
“symfony/symfony”：“2.1.7”，
“想象/想象”：“>=0.2.8”，
“liip/imagine bundle”：“*@dev”，
“KNPLAB/knp分页器包”：“开发主机”，
“cbsi/doctrine2嵌套集”：“开发主机”，
“练习/htmlpurifier包”：“开发大师”，
“条令/orm”：“>=2.2.3，引导程序文件未正确重建，composer.json文件应具有脚本项，以确保为您完成此任务（除非您使用--no scripts标志运行）

通过在symfony目录中运行以下命令，可以手动运行构建引导文件的脚本：

php /vendor/sensio/distribution-bundle/Sensio/Bundle/DistributionBundle/Resources/bin/build_bootstrap.php

尝试更新编写器（）

在
C:\Users\\AppData\Roaming\Composer
（）

然后再次运行更新

手动删除symfony2缓存文件夹可能会有所帮助。
如果有人对sensio distribution bundle=5有相同的错误，那么您的问题应该是
您是否更新了所有symfony bundle的完整列表？是的，我已更新，请参阅我的composer.json require语句。有时值得尝试删除其中的任何内容e
vendor
文件夹并再次运行
composer install
命令
php /vendor/sensio/distribution-bundle/Sensio/Bundle/DistributionBundle/Resources/bin/build_bootstrap.php

composer self-update