我的操作系统：Ubuntu 20.0 我的 PHP 版本：PHP 7.4.15
我正在开发一个基于 Yii2 框架的项目，我正在尝试使用以下命令添加一个名为“kartik-date-time-picker”的新包：
composer require kartik-v/yii2-widget-datetimepicker "dev-master"
但它失败了，并给了我这样的输出：
./composer.json has been updated
Loading composer repositories with package information
Warning from https://repo.packagist.org: You are using an outdated version of Composer. Composer 2.0 is now available and you should upgrade. See https://getcomposer.org/2
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.
Problem 1
- The requested package sunhater/kcfinder (locked at dev-master) is satisfiable by sunhater/kcfinder[dev-master] but these conflict with your requirements or minimum-stability.
Problem 2
- Installation request for filipajdacic/yii2-cpanel-email-creator * -> satisfiable by filipajdacic/yii2-cpanel-email-creator[dev-master].
- Removal request for filipajdacic/yii2-cpanel-email-creator == 9999999-dev
Problem 3
- robregonm/yii2-pdf dev-master requires php ^5.6 || ~7.0.0 || ~7.1.0 || ~7.2.0 || ~7.3.0 -> your PHP version (7.4.15) does not satisfy that requirement.
- robregonm/yii2-pdf dev-master requires php ^5.6 || ~7.0.0 || ~7.1.0 || ~7.2.0 || ~7.3.0 -> your PHP version (7.4.15) does not satisfy that requirement.
- robregonm/yii2-pdf dev-master requires php ^5.6 || ~7.0.0 || ~7.1.0 || ~7.2.0 || ~7.3.0 -> your PHP version (7.4.15) does not satisfy that requirement.
- Installation request for robregonm/yii2-pdf dev-master -> satisfiable by robregonm/yii2-pdf[dev-master].
Installation failed, reverting ./composer.json to its original content.
我该如何解决这个问题？我在 PHP 7.4.15 版本和 Ubuntu 20.0 操作系统上运行。
我的 composer.json :
{
"name": "yiisoft/yii2-app-advanced",
"description": "Yii 2 Advanced Project Template",
"keywords": ["yii2", "framework", "advanced", "project template"],
"homepage": "http://www.yiiframework.com/",
"type": "project",
"license": "BSD-3-Clause",
"support": {
"issues": "https://github.com/yiisoft/yii2/issues?state=open",
"forum": "http://www.yiiframework.com/forum/",
"wiki": "http://www.yiiframework.com/wiki/",
"irc": "irc://irc.freenode.net/yii",
"source": "https://github.com/yiisoft/yii2"
},
"minimum-stability": "stable",
"require": {
"php": ">=5.6.0",
"yiisoft/yii2": "~2.0.14",
"yiisoft/yii2-bootstrap": "~2.0.0",
"yiisoft/yii2-swiftmailer": "~2.0.0 || ~2.1.0",
"dmstr/yii2-adminlte-asset": "^2.6",
"kartik-v/yii2-export": "*",
"kartik-v/yii2-widget-datepicker": "@dev",
"kartik-v/yii2-field-range": "*",
"2amigos/yii2-multi-select-widget": "*",
"yii2mod/yii2-rbac": "*",
"robregonm/yii2-pdf": "dev-master",
"2amigos/yii2-ckeditor-widget" : "*",
"kartik-v/yii2-editable": "dev-master",
"kartik-v/yii2-widget-select2": "dev-master",
"wbraganca/yii2-dynamicform": "*",
"filipajdacic/yii2-cpanel-email-creator": "*"
},
"require-dev": {
"yiisoft/yii2-debug": "~2.1.0",
"yiisoft/yii2-gii": "~2.1.0",
"yiisoft/yii2-faker": "~2.0.0",
"codeception/codeception": "^4.0",
"codeception/module-asserts": "^1.0",
"codeception/module-yii2": "^1.0",
"codeception/module-filesystem": "^1.0",
"codeception/verify": "~0.5.0 || ~1.1.0",
"symfony/browser-kit": ">=2.7 <=4.2.4"
},
"config": {
"process-timeout": 1800,
"fxp-asset": {
"enabled": false
}
},
"repositories": [
{
"type": "composer",
"url": "https://asset-packagist.org"
}
]
}