无法安装 composer PHP 版本错误

Question

我将在我的 php 项目中为电子PHP表格安装一个Composer，但出现php version错误。我尝试安装了很多次，但仍然是同样的错误。这个 composer.json{    "name": "phpoffice/phpspreadsheet",    "description": "PHPSpreadsheet - Read, Create and Write Spreadsheet documents in PHP - Spreadsheet engine",    "keywords": ["PHP", "OpenXML", "Excel", "xlsx", "xls", "ods", "gnumeric", "spreadsheet"],    "homepage": "https://github.com/PHPOffice/PhpSpreadsheet",    "type": "library",    "license": "LGPL-2.1-or-later",    "authors": [        {            "name": "Maarten Balliauw",            "homepage": "https://blog.maartenballiauw.be"        },        {            "name": "Mark Baker",            "homepage": "https://markbakeruk.net"        },        {            "name": "Franck Lefevre",            "homepage": "https://rootslabs.net"        },        {            "name": "Erik Tilt"        },        {            "name": "Adrien Crivelli"        }    ],    "scripts": {        "check": [            "php-cs-fixer fix --ansi --dry-run --diff",            "phpcs --report-width=200 samples/ src/ tests/ --ignore=samples/Header.php --standard=PSR2 -n",            "phpunit --color=always"        ],        "fix": [            "php-cs-fixer fix --ansi"        ],    },这些是错误显示- Installation request for mpdf/mpdf v7.1.6 -> satisfiable by mpdf/mpdf[v7.1.6].    - mpdf/mpdf v7.1.6 requires php ^5.6 || ~7.0.0 || ~7.1.0 || ~7.2.0 -> your PHP version (7.3.6) does not satisfy that requirement.- Installation request for mpdf/mpdf v7.1.6 -> satisfiable by mpdf/mpdf[v7.1.6].- mpdf/mpdf v7.1.6 requires php ^5.6 || ~7.0.0 || ~7.1.0 || ~7.2.0 -> your PHP version (7.3.6) does not satisfy that requirement.请帮忙。

Answer 1

使用以下命令安装依赖项：

composer install --ignore-platform-reqs

或使用以下内容更新 composer.json

"config": {

    "preferred-install": "dist",

    "platform": {

        "php": "7.2.0"

    }

}

上述任何一种解决方案都会对您有所帮助。