Php 无法将Laravel 5.4更新为5.5 composer

当我试图从5.4更新Laravel5.5时，显示错误

{
    "name": "laravel/laravel",
    "description": "The Laravel Framework.",
    "keywords": ["framework", "laravel"],
    "license": "MIT",
    "type": "project",
    "require": {
        "php": ">=7.0",
        "intervention/image": "^2.4",
        "laravel/framework": "5.5.*",
        "laravel/tinker": "~1.0"
    },
    "require-dev": {
        "fzaninotto/faker": "~1.4",
        "mockery/mockery": "0.9.*",
        "phpunit/phpunit": "~6.0"
    },
    "autoload": {
        "classmap": [
            "database"
        ],
        "psr-4": {
            "App\\": "app/"
        }
    },
    "autoload-dev": {
        "psr-4": {
            "Tests\\": "tests/"
        }
    },
    "scripts": {
        "post-root-package-install": [
            "php -r \"file_exists('.env') || copy('.env.example', '.env');\""
        ],
        "post-create-project-cmd": [
            "php artisan key:generate"
        ],
        "post-install-cmd": [
            "Illuminate\\Foundation\\ComposerScripts::postInstall",
            "php artisan optimize"
        ],
        "post-update-cmd": [
            "Illuminate\\Foundation\\ComposerScripts::postUpdate",
            "php artisan optimize"
        ]
    },
    "config": {
        "preferred-install": "dist",
        "sort-packages": true,
        "optimize-autoloader": true
    }
}

这是我的composer.json文件。 当我使用命令composer update时，这将显示

Problem 1
        - This package requires php >=7.0 but your PHP version (5.6.25) does not satisfy that requirement.
      Problem 2
        - Installation request for laravel/framework 5.5.* -> satisfiable by laravel/framework[v5.5.0].
        - laravel/framework v5.5.0 requires php >=7.0 -> your PHP version (5.6.25) does not satisfy that requirement.
      Problem 3
        - phpunit/phpunit 6.3.0 requires php ^7.0 -> your PHP version (5.6.25) does not satisfy that requirement.
        - phpunit/phpunit 6.2.4 requires php ^7.0 -> your PHP version (5.6.25) does not satisfy that requirement.
        - phpunit/phpunit 6.2.3 requires php ^7.0 -> your PHP version (5.6.25) does not satisfy that requirement.
        - phpunit/phpunit 6.2.2 requires php ^7.0 -> your PHP version (5.6.25) does not satisfy that requirement.
        - phpunit/phpunit 6.2.1 requires php ^7.0 -> your PHP version (5.6.25) does not satisfy that requirement.
        - phpunit/phpunit 6.2.0 requires php ^7.0 -> your PHP version (5.6.25) does not satisfy that requirement.
        - phpunit/phpunit 6.1.4 requires php ^7.0 -> your PHP version (5.6.25) does not satisfy that requirement.
        - phpunit/phpunit 6.1.3 requires php ^7.0 -> your PHP version (5.6.25) does not satisfy that requirement.
        - phpunit/phpunit 6.1.2 requires php ^7.0 -> your PHP version (5.6.25) does not satisfy that requirement.
        - phpunit/phpunit 6.1.1 requires php ^7.0 -> your PHP version (5.6.25) does not satisfy that requirement.
        - phpunit/phpunit 6.1.0 requires php ^7.0 -> your PHP version (5.6.25) does not satisfy that requirement.
        - phpunit/phpunit 6.0.9 requires php ^7.0 -> your PHP version (5.6.25) does not satisfy that requirement.
        - phpunit/phpunit 6.0.8 requires php ^7.0 -> your PHP version (5.6.25) does not satisfy that requirement.
        - phpunit/phpunit 6.0.7 requires php ^7.0 -> your PHP version (5.6.25) does not satisfy that requirement.
        - phpunit/phpunit 6.0.6 requires php ^7.0 -> your PHP version (5.6.25) does not satisfy that requirement.
        - phpunit/phpunit 6.0.5 requires php ^7.0 -> your PHP version (5.6.25) does not satisfy that requirement.
        - phpunit/phpunit 6.0.4 requires php ^7.0 -> your PHP version (5.6.25) does not satisfy that requirement.
        - phpunit/phpunit 6.0.3 requires php ^7.0 -> your PHP version (5.6.25) does not satisfy that requirement.
        - phpunit/phpunit 6.0.2 requires php ^7.0 -> your PHP version (5.6.25) does not satisfy that requirement.
        - phpunit/phpunit 6.0.13 requires php ^7.0 -> your PHP version (5.6.25) does not satisfy that requirement.
        - phpunit/phpunit 6.0.12 requires php ^7.0 -> your PHP version (5.6.25) does not satisfy that requirement.
        - phpunit/phpunit 6.0.11 requires php ^7.0 -> your PHP version (5.6.25) does not satisfy that requirement.
        - phpunit/phpunit 6.0.10 requires php ^7.0 -> your PHP version (5.6.25) does not satisfy that requirement.
        - phpunit/phpunit 6.0.1 requires php ^7.0 -> your PHP version (5.6.25) does not satisfy that requirement.
        - phpunit/phpunit 6.0.0 requires php ^7.0 -> your PHP version (5.6.25) does not satisfy that requirement.
        - Installation request for phpunit/phpunit ~6.0 -> satisfiable by phpunit/phpunit[6.0.0, 6.0.1, 6.0.10, 6.0.11, 6.0.12, 6.0.13, 6.0.
    2, 6.0.3, 6.0.4, 6.0.5, 6.0.6, 6.0.7, 6.0.8, 6.0.9, 6.1.0, 6.1.1, 6.1.2, 6.1.3, 6.1.4, 6.2.0, 6.2.1, 6.2.2, 6.2.3, 6.2.4, 6.3.0].

---

我的PHP版本是7.0.10，我使用wamp。

您的PHP版本是5.6

This package requires php >=7.0 but your PHP version (5.6.25) does not satisfy that requirement.

因此，将您的PHP版本更改为PHP 7.0并运行：

composer install

---

我过去也有过类似的问题。。这种情况发生在wamp上。。使用命令提示符检查您的php版本。。有时wamp会显示v7，但项目会在后台继续使用旧版本。

---

或者在laravel上创建一个路由以显示php版本。。它将确认问题所在。

尝试composer安装--忽略平台需求

您需要删除

composer。根据错误，锁定
文件并再次运行
composer安装
，您的php版本为5.6.25？错误表明composer看到的是php 5.6，当您
php-v
时显示的是什么版本？如果在控制台中键入“php-v”，您会得到什么？php 5.6.25（cli）（构建日期：2016年8月18日11:40:20）我如何编辑此phpinfo（）显示php版本5.6.25。在wamp中，我点击了7.0.10。如何更改cli版本。请在路径中包含wamp的PHP可执行文件路径，或者像下面这样运行composer
C:\wamp\path\PHP\PHP.exe composer install
请参阅您需要更新cli的PHP版本。google update php cli for windows，您将找到许多指南。完成后，您需要更新wamp php.ini文件，然后重新启动wamp。您可能应该考虑到a）
composer.lock
存在，b）
composer.json
已手动编辑，因此，最好运行
composer require--update with dependenciences laravel/framework:^5.5
。你怎么认为？