Composer, a popular PHP dependency manager, offers two key commands: composer update and composer install. While they share a common goal of managing dependencies, they serve distinct purposes and operate in different ways.
When you run composer update, it examines the composer.json file and compares it to the installed packages. For each dependency declared in composer.json, it determines the latest available version and installs or upgrades to it. This behavior is particularly useful during development when you want to keep up with the latest updates for your project's dependencies.
Detailed steps performed by composer update:
In contrast, composer install doesn't update any packages. Instead, it relies on the composer.lock file, which is created and managed by composer update. It reads this file and installs all the dependencies specified within it. This ensures that the application's dependencies remain consistent across different environments, such as development and production.
Steps performed by composer install:
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