Composer无法找到配置文件问题求助（PHP新手）

我是PHP初学者，执行composer require symfonycasts/verify-email-bundle时出现错误：

Composer could not find the config file: C:... . To initialize a project, please create a composer.json file.

我已拥有composer.json文件，内容如下：

{
    "name": "symfony/website-skeleton",
    "type": "project",
    "license": "MIT",
    "description": "A skeleton to start a new Symfony website",
    "minimum-stability": "stable",
    "prefer-stable": true,
    "require": {
        "php": ">=8.1",
        "ext-ctype": "*",
        "ext-iconv": "*",
        "doctrine/annotations": "*",
        "doctrine/dbal": "^3",
        "doctrine/doctrine-bundle": "^2.12",
        "doctrine/doctrine-migrations-bundle": "^3.3",
        "doctrine/orm": "^2.11",
        "phpdocumentor/reflection-docblock": "^5.4",
        "phpstan/phpdoc-parser": "^1.29",
        "symfony/asset": "6.1.*",
        "symfony/console": "6.1.*",
        "symfony/doctrine-messenger": "6.1.*",
        "symfony/dotenv": "6.1.*",
        "symfony/expression-language": "6.1.*",
        "symfony/flex": "^2",
        "symfony/form": "6.1.*",
        "symfony/framework-bundle": "6.1.*",
        "symfony/http-client": "6.1.*",
        "symfony/intl": "6.1.*",
        "symfony/mailer": "6.1.*",
        "symfony/mime": "6.1.*",
        "symfony/monolog-bundle": "^3.0",
        "symfony/notifier": "6.1.*",
        "symfony/process": "6.1.*",
        "symfony/property-access": "6.1.*",
        "symfony/property-info": "6.1.*",
        "symfony/runtime": "6.1.*",
        "symfony/security-bundle": "6.1.*",
        "symfony/serializer": "6.1.*",
        "symfony/string": "6.1.*",
        "symfony/translation": "6.1.*",
        "symfony/twig-bundle": "6.1.*",
        "symfony/validator": "6.1.*",
        "symfony/web-link": "6.1.*",
        "symfony/yaml": "6.1.*",
        "symfonycasts/verify-email-bundle": "^1.17",
        "twig/extra-bundle": "^2.12|^3.0",
        "twig/twig": "^2.12|^3.0"
    },
    "require-dev": {
        "phpunit/phpunit": "^9.5",
        "symfony/browser-kit": "6.1.*",
        "symfony/css-selector": "6.1.*",
        "symfony/debug-bundle": "6.1.*",
        "symfony/maker-bundle": "^1.0",
        "symfony/phpunit-bridge": "^7.0",
        "symfony/stopwatch": "6.1.*",
        "symfony/web-profiler-bundle": "6.1.*"
    },
    "config": {
        "allow-plugins": {
            "composer/package-versions-deprecated": true,
            "symfony/flex": true,
            "symfony/runtime": true
        },
        "optimize-autoloader": true,
        "preferred-install": {
            "*": "dist"
        },
        "sort-packages": true
    },
    "autoload": {
        "psr-4": {
            "App\": "src/"
        }
    },
    "autoload-dev": {
        "psr-4": {
            "App\\Tests": "tests/"
        }
    },
    "replace": {
        "symfony/polyfill-ctype": "*",
        "symfony/polyfill-iconv": "*",
        "symfony/polyfill-php72": "*",
        "symfony/polyfill-php73": "*",
        "symfony/polyfill-php74": "*",
        "symfony/polyfill-php80": "*",
        "symfony/polyfill-php81": "*"
    },
    "scripts": {
        "auto-scripts": {
            "cache:clear": "symfony-cmd",
            "assets:install %PUBLIC_DIR%": "symfony-cmd"
        },
        "post-install-cmd": [
            "@auto-scripts"
        ],
        "post-update-cmd": [
            "@auto-scripts"
        ]
    },
    "conflict": {
        "symfony/symfony": "*",
        "doctrine/orm": "2.12.0"
    },
    "extra": {
        "symfony": {
            "allow-contrib": false,
            "require": "6.1.*"
        }
    }
}

相关配置信息 #

• 项目文件夹及Composer文件夹中均存在composer.json
• 使用Composer版本2.7.4 2024-04-22 21:17:03，PHP版本8.3.6（C:\php7\php.exe）
• PHP与Composer已添加至系统及用户环境变量
• 在CMD中执行composer show时，提示：

  Composer could not find the config file: C:\composer(BUT MY COMPOSER.JSON IS IN Composer FOLDER :( ) To initialize a project, please create a composer.json file

排查解决步骤 #

1. 切换到项目根目录执行命令
   Composer默认在当前工作目录查找composer.json。打开CMD后，先用cd命令切换到你的项目文件夹根目录（比如cd D:\my-symfony-project），再执行composer require symfonycasts/verify-email-bundle。

2. 检查全局配置是否异常
   执行composer config --list --global查看全局配置，确认是否有指定错误的composer.json路径。如果有异常配置，用composer config --global --unset <配置项>清除。

3. 直接指定项目目录执行命令
   如果切换目录麻烦，可通过--working-dir参数指定项目路径：

composer --working-dir=你的项目绝对路径 require symfonycasts/verify-email-bundle

4. 检查COMPOSER环境变量
   在CMD中执行echo %COMPOSER%，如果输出了某个路径，检查该路径下的composer.json是否正确，若为错误设置，直接删除这个环境变量。

内容的提问来源于stack exchange，提问作者Victoria Zamana