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composer^这个符号什么意思不太明白?

时间:2021-07-01 10:21:17 帮助过:10人阅读

这是官网的话
Caret#

The ^ operator behaves very similarly but it sticks closer to semantic versioning, and will always allow non-breaking updates. For example ^1.2.3 is equivalent to >=1.2.3 <2.0.0 as none of the releases until 2.0 should break backwards compatibility. For pre-1.0 versions it also acts with safety in mind and treats ^0.3 as >=0.3.0 <0.4.0.

This is the recommended operator for maximum interoperability when writing library code.

Example: ^1.2.3
Composer

回复内容:

这是官网的话
Caret#

The ^ operator behaves very similarly but it sticks closer to semantic versioning, and will always allow non-breaking updates. For example ^1.2.3 is equivalent to >=1.2.3 <2.0.0 as none of the releases until 2.0 should break backwards compatibility. For pre-1.0 versions it also acts with safety in mind and treats ^0.3 as >=0.3.0 <0.4.0.

This is the recommended operator for maximum interoperability when writing library code.

Example: ^1.2.3
Composer

@查尔斯 ~^的意思很接近,在x.y的情况下是一样的都是代表x.y <= 版本号 < (x+1).0,但是在版本号是x.y.z的情况下有区别,举个例子吧:

  • ~1.2.3 代表 1.2.3 <= 版本号 < 1.3.0

  • ^1.2.3 代表 1.2.3 <= 版本号 < 2.0.0

详见: https://getcomposer.org/doc/a...

感谢 @北月武士 指正

^符号意思,用于匹配下一个重要版本

举例:

composer.json

{
    "require": {
        "topthink/framework": "^5.0-rc1"
    }
}

执行sudo composer install 以后效果如下

匹配到了composer库详情页的最新一个重要版本

https://packagist.org/package...

另外备注下:犯这个错误是因为一个前提条件,我一般只关心次版本号,而不会关心修正号,所以如果你一直指定~x.y和^x.y的确是一样的,哪怕库的版本号就是用x.y.z的版本规范命名的

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