Laravel error '- '类AppHttp内核不存在' - Laravel error 'ReflectionException' - 'Class AppHttpKernel does not exist'

我一年前在学校开发了一个小型旅行项目，当时我正试图上线，但遇到了一些问题。在把整个项目上传到我的主机服务服务器上后，我的浏览器和SSH shell上都出现了这些错误。

致命错误:未捕获的异常'ReflectionException'与消息'类App'Http'内核不存在'在/home/clients/ffa41f94063541f86a0fe6602a73caa1/myforms/vendor/laravel/framework/src/Illuminate/Container/Container.php:779#0/home/clients/ffa41f94063541f86a0fe6602a73caa1/myforms/vendor/laravel/framework/src/Illuminate/Container/Container.php(779): ReflectionClass->__construct('App'Http'Kernel') #1/home/clients/ffa41f94063541f86a0fe6602a73caa1/myforms/vendor/laravel/framework/src/Illuminate/Container/Container.php(659):照亮'Container'Container->build('App'Http'Kernel'， Array) #2/home/clients/ffa41f94063541f86a0fe6602a73caa1/myforms/vendor/laravel/framework/src/Illuminate/Foundation/Application.php(644):照亮'Container'Container->make('App'Http'Kernel'， Array) #3/home/clients/ffa41f94063541f86a0fe6602a73caa1/myforms/vendor/laravel/framework/src/Illuminate/Container/Container.php(229):照亮'Foundation'Application->make('App'Http'Kernel'， Array) #4/home/clients/ffa41f94063/home/clients/ffa41f94063541f86a0fe6602a73caa1/myforms/vendor/laravel/framework/src/Illuminate/Container/Container.php on line 779

我想这可能与我的命名空间配置有关，因为我还没有完全理解。

这是我的作曲家。Json文件:

{
	"name": "laravel/laravel",
	"description": "The Laravel Framework.",
	"keywords": ["framework", "laravel"],
	"license": "MIT",
	"type": "project",
	"require": {
		"laravel/framework": "5.0.*",
		"illuminate/html": "5.*",
		"barryvdh/laravel-dompdf": "0.5.*",
		"guzzlehttp/guzzle": "~4.0"
	},
	"require-dev": {
		"phpunit/phpunit": "~4.0",
		"phpspec/phpspec": "~2.1"
	},
	"autoload": {
		"classmap": [
			"database"
		],
		"psr-4": {
			"App''": "myforms/app/"
		}
	},
	"autoload-dev": {
		"classmap": [
			"tests/TestCase.php"
		]
	},
	"scripts": {
		"post-install-cmd": [
			"php artisan clear-compiled",
			"php artisan optimize"
		],
		"post-update-cmd": [
			"php artisan clear-compiled",
			"php artisan optimize"
		],
		"post-create-project-cmd": [
			"php -r '"copy('.env.example', '.env');'"",
			"php artisan key:generate"
		]
	},
	"config": {
		"preferred-install": "dist"
	}
}

我已经做了什么:

删除/vendor并使用composer install进行新安装
composer dump-autoload
composer update顺便说一句，当我插入composer update

请告诉我，如果我应该张贴另一个文件，可能是有用的。

提前感谢您的帮助。

json变化:

 "psr-4": {
        "App''": "myforms/app/"
    }

 "psr-4": {
        "App''": "app/"
    }

在服务器上，在源目录下，运行composer update，然后运行composer dump-autoload

PSR-4在Laravel中查找相对于项目根目录的命名空间

检查console/kernel.php是否在app -文件夹内，如果不是，它可能在laravelApp内。

如果是，将console/kernel.php移动到app -folder.

在我的例子中，composer。Json中缺少结束"{}"的右括号，并且"psr-4"行在错误的Json段中。

检查作曲家。为了正确对齐"psr-4"，它应该是"autoload"部分的子部分。
删除供应商

好

{
	"name": "laravel/laravel",
	"description": "The Laravel Framework.",
	"keywords": ["framework", "laravel"],
	"license": "MIT",
	"type": "project",
	"require": {
		"laravel/framework": "5.0.*",
		"illuminate/html": "5.*",
		"barryvdh/laravel-dompdf": "0.5.*",
		"guzzlehttp/guzzle": "~4.0"
	},
	"require-dev": {
		"phpunit/phpunit": "~4.0",
		"phpspec/phpspec": "~2.1"
	},
	"autoload": {
		"classmap": [
			"database"
		],
		"psr-4": {
			"App''": "myforms/app/"
		}
	},
	"autoload-dev": {
		"classmap": [
			"tests/TestCase.php"
		]
	},
	"scripts": {
		"post-install-cmd": [
			"php artisan clear-compiled",
			"php artisan optimize"
		],
		"post-update-cmd": [
			"php artisan clear-compiled",
			"php artisan optimize"
		],
		"post-create-project-cmd": [
			"php -r '"copy('.env.example', '.env');'"",
			"php artisan key:generate"
		]
	},
	"config": {
		"preferred-install": "dist"
	}
}

在这里的其他答案的帮助下，我意识到我刚刚错过了从Laravel 5.5手动更新到5.7的更改

的作曲家。我在自动加载块中漏掉了这个:

"autoload": {
    "psr-4": {
        "App''": "app/"
    },
    ...
},

如果你正在使用版本控制，在你的开发机器上运行composer update来更新composer.lock。然后在生产服务器上，只需要运行composer install