Composer ^ What does this symbol mean not to understand?

This is the official website.
caret#

The ^ operator behaves very similarly but it sticks closer to semantic versioning, and would always allow non-breaking UPDA Tes. For example ^1.2.3 are equivalent to >=1.2.3 <2.0.0 as none of the releases until 2.0 should break backwards Compatib Ility. For pre-1.0 versions It also acts with safety on mind and treats ^0.3 as >=0.3.0 <0.4.0.

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

Example: ^1.2.3
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This is the official website.
caret#

The ^ operator behaves very similarly but it sticks closer to semantic versioning, and would always allow non-breaking UPDA Tes. For example ^1.2.3 are equivalent to >=1.2.3 <2.0.0 as none of the releases until 2.0 should break backwards Compatib Ility. For pre-1.0 versions It also acts with safety on mind and treats ^0.3 as >=0.3.0 <0.4.0.

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

Example: ^1.2.3
Composer

@ Charles ~ and ^ The meaning is very close, in x.y the case is the same is represented x.y <= 版本号 < (x+1).0 , but in the case of the version number is x.y.z the difference, for example:

• ~1.2.3Represent1.2.3 <= 版本号 < 1.3.0

• ^1.2.3Represent1.2.3 <= 版本号 < 2.0.0

See: https://getcomposer.org/doc/a ...

Thanks @ North Moon Samurai

^ Symbolic meaning, used to match next important version

Example:

Composer.json

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

The following results are performed after sudo composer install

Match to the latest important version of the Composer Library Detail page

Https://packagist.org/package ...

Another remark: Make this mistake is because of a precondition, I generally only care about the minor version number, but do not care about the correction number, so if you always specify ~X.Y and ^x.y is exactly the same, even if the library version number is the version of the X.Y.Z specification named

