laravel 5.5升级6.0

直接复制6.0 composer.json替换之前

{
    "name": "laravel/laravel",
    "type": "project",
    "description": "The Laravel Framework.",
    "keywords": [
        "framework",
        "laravel"
    ],
    "license": "MIT",
    "require": {
        "php": "^7.2.5|^8.0",
        "fideloper/proxy": "^4.4",
        "laravel/framework": "^6.20.26",
        "laravel/tinker": "^2.5"
    },
    "require-dev": {
        "facade/ignition": "^1.16.15",
        "fakerphp/faker": "^1.9.1",
        "mockery/mockery": "^1.0",
        "nunomaduro/collision": "^3.0",
        "phpunit/phpunit": "^8.5.8|^9.3.3"
    },
    "config": {
        "optimize-autoloader": true,
        "preferred-install": "dist",
        "sort-packages": true
    },
    "extra": {
        "laravel": {
            "dont-discover": []
        }
    },
    "autoload": {
        "psr-4": {
            "App\\": "app/"
        },
        "classmap": [
            "database/seeds",
            "database/factories"
        ]
    },
    "autoload-dev": {
        "psr-4": {
            "Tests\\": "tests/"
        }
    },
    "minimum-stability": "dev",
    "prefer-stable": true,
    "scripts": {
        "post-autoload-dump": [
            "Illuminate\\Foundation\\ComposerScripts::postAutoloadDump",
            "@php artisan package:discover --ansi"
        ],
        "post-root-package-install": [
            "@php -r \"file_exists('.env') || copy('.env.example', '.env');\""
        ],
        "post-create-project-cmd": [
            "@php artisan key:generate --ansi"
        ]
    }
}

执行

composer update

--------------------------------------------

问题：出现报错

In cache.php line 91:
                                         
  Call to undefined function str_slug()  
                                         

Script @php artisan package:discover --ansi handling the post-autoload-dump event returned with error code 1

解决方法：因为使用use Illuminate\Support\Str; 替换现在str_slug，

直接找到https://github.com/laravel/laravel/blob/6.x/config/cache.php 替换对应目录下cache.php文件

同样问题出现config/session.php,

--------------------------------------------------------------

其它代码对应升级找到版本

Zizaco/entrust已经没有支持laravel6.0以上版本

使用https://github.com/jromero98/entrust/tree/2.0代替，详细可以参考文档

如果

composer require trebol/entrust:0.6

出现错误

使用,忽略php强制要求

composer require trebol/entrust:0.6 --ignore-platform-reqs