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Editor to share with you how to use composer install and update, I believe that most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

Install install

Composer install reads third-party components and their versions from composer.lock and installs them into the vendor directory.

If the composer.lock file does not exist, read the composer.json third-party components and their versions, and install them into the vendor directory.

Update update

Update obtains third-party components and their versions directly from composer.json, and then updates the composer.lock file.

If the dependent third-party component has a version update, update installs the latest version into the vendor directory and updates composer.lock.

Use experience

In the production environment, it is risky to use the composer update command directly, because there may be a problem that the version of the third-party component library is used in the testing phase, and the composer update command is executed when it is packaged online, resulting in the release of third-party component updates without testing.

It is recommended to add both composer.json and composer.lock to version management in the process of version management, pay attention to the changes of dependent versions in composer.lock during development, use composer install every time you go online, and obtain dependent third-party components and versions from composer.lock.

If you need to update third-party components, when you execute the composer update command, you should append the component libraries that need to be updated later.

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