How composer can only update and load automatically

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Specific problem description:

Composer only updates the autoload, not the dependency?

Psr-4 automatic loading has been added to composer.json

Then execute composer update to load the added directory

Dependency packages are always updated when update is executed

How can I just update the autoload and not update the dependency?

Solution:

Composer dump-autoload

Print auto-load index dump-autoload

In some cases you need to update autoloader, such as adding a new class to your package. You can use dump-autoload to do this without having to execute install or update commands.

In addition, it can print an index of classes that are optimized and conform to the PSR-0/4 specification, which is also for performance considerations. In large applications, there will be many kinds of files, and autoloader will take up a large part of the time of each request, so it may not be convenient to use classmaps in development, but it can still get the convenience brought by PSR-0/4 specification while ensuring performance.

Print automatically load Index-Parameter

-- optimize (- o): convert PSR-0/4 autoloading to classmap for faster loading. This is especially suitable for production environments, but it may take some time to run, so it is not currently the default setting.

-- no-dev: disable the autoload-dev rule.

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