How does Composer perform a downgrade operation? Teach you how to downgrade to version 1

This article is introduced by the tutorial column of composer to downgrade Composer to version 1. I hope it will be helpful to friends in need!

Composer domestic acceleration: Composer downgraded to version 1

View the current version:

$ composer --version

Perform downgrade operation:

$ composer self-update --1

Determine the current version:

$ composer --version

Related introduction:

Composer is A dependency management tool for PHP5.3 and above. It allows you to declare the code libraries your project depends on and it will install them for you in your project. Composer is not a package manager. Yes, it involves "packages" and "libraries", but it's managed on a per-project basis, with installations in some directory within your project (e.g. vendor). By default it won't install anything globally. So this is just a dependency management.

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