如何使用 Laravel 5.6 升级 Carbon？
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How can I upgrade Carbon with Laravel 5.6?
提问by Sára Kata Király
I tried in cmd "composer require nesbot/carbon" but I got this:
我在 cmd 中试过“composer 需要 nesbot/carbon”，但我得到了这个：
Your requirements could not be resolved to an installable set of packages.
Problem 1
- laravel/framework v5.6.27 requires nesbot/carbon 1.25.* -> satisfiable by nesbot/carbon[1.25.0] but these conflict with your requirements or minimum-stability.
- laravel/framework v5.6.27 requires nesbot/carbon 1.25.* -> satisfiable by nesbot/carbon[1.25.0] but these conflict with your requirements or minimum-stability.
- laravel/framework v5.6.27 requires nesbot/carbon 1.25.* -> satisfiable by nesbot/carbon[1.25.0] but these conflict with your requirements or minimum-stability.
- Installation request for laravel/framework (locked at v5.6.27, required as 5.6.*) -> satisfiable by laravel/framework[v5.6.27].
Installation failed, reverting ./composer.json to its original content.
回答by Devon
I don't recommend doing this without extreme caution because there may be a reason why Laravel, or any of your other dependencies, require a very strict version of a package.
我不建议在没有非常谨慎的情况下执行此操作，因为 Laravel 或任何其他依赖项需要非常严格的包版本可能是有原因的。
With that said, Composer does include a neat trick to alias versions to get around this by specifying an alias version in composer.json:
话虽如此，Composer 确实包含了一个巧妙的别名版本技巧，可以通过在 中指定别名版本来解决这个问题composer.json：
"require": {
...
"nesbot/carbon": "1.32.0 as 1.25.0"
},
Note the as 1.25.0which will trick other packages into thinking 1.32.0is equivalent to 1.25.0for dependencies. This trick requires exact versions.
请注意as 1.25.0which 会欺骗其他包的想法1.32.0等同于1.25.0for 依赖项。这个技巧需要精确的版本。
回答by Manoj Patel
Carbon 2 is officially supported by Laravel since the version 5.8, if you want to use it on a lower version, you can follow those steps:
从 5.8 版本开始，Laravel 正式支持 Carbon 2，如果您想在较低版本上使用它，您可以按照以下步骤操作：
Set explicitly the Carbon version and add the adapter in your composer.json:
明确设置 Carbon 版本并在 composer.json 中添加适配器：
{
"require": {
"nesbot/carbon": "2.21.3 as 1.34.0"
}
}
