![]() Let's demonstrate its usage through a simple example: #Use ComposerĬomposer is now ready to use. ![]() Composer - Package Management for PHP See https : /// for more information. If you see an output similar to the one below, you are ready to go. To verify if Composer is installed properly, run command below from the directory Composer is installed (Anywhere if Composer is installed globally). Run commands below from your project root directory to install Composer locally: curl - sS https : ///installer | php -filename=composerįor a more detailed installation guide on Composer, check out: If you encounter any errors related to permissions, run commands above in sudo mode (append sudo to each command) Run commands below from your Terminal to install Composer globally: curl - sS https : ///installer | php mv composer. Global installation saves us a lot of hassle. After all, it is very likely we will use Composer to manage dependency for every PHP project. From professional experience, we suggest installing Composer globally on your system. There are two scopes when installing Composer: local scope and global scope. As a developer, it is recommended you leverage the power of Packagist as it will save you countless hours and energy. Next time you need a PHP package, instead of building one from scratch on your own, there is a good chance you can find it on Packagist. As of the time of this writing, September 2015, 69,568 packages are available on Packagist. You do, however, get starts if people like your packages.Īs mentioned earlier, Packagist() is the default package repository for Composer. Unlike PEAR, there is no need to get up-votes whatsoever. This makes managing multiple projects easy and keeps your machine clean as it only downloads packages to your project directory.Įveryone is welcome to submit their packages to Packagist. The Composer ecosystem consists of two parts: the Composer, which is the command-line utility for installing packages, and the Packagist, the default package repository.Īn application-level package manager means it manages dependencies on a per project basis. It is inspired by NodeJs's NPM and Ruby's Bundler, and is currently the recognized package manager by the community. At the end of day, developers want to write code, not promote code.Ĭomposer is an application-level package manager for PHP. ![]() ![]() This discouragement slows down growth of its repository. A certain number of up-votes is required in order to have your code accepted into PEAR's repository.When you have multiple projects, which share the same dependencies, but each has different versions, this approach causes a lot of confusion and frustration. Unlike Composer, PEAR is a system-wide package manager.However, it has been discouraged by developers due to the following reasons: PEAR is made for the purpose of promoting reusable packages, similar to Composer. If you started with PHP early on, you may be aware of PEAR, as it has been in existence since 1999. Prior to Composer, there was something called PEAR. We do need a package manager, a package manager that can solve all of these dependency headaches for us. We are only talking about one single dependency here it would soon turn to be a nightmare if "Package A" has multiple dependencies or there is a chain of dependencies. It might still not work, because we also need to make sure that we download the correct version of "Package B". What would we need to do in order to get "Package A", which has a dependency of "Package B" to work? First we download source code of "Package A", then discover it depends on "Package B", so we try our best to find source code of "Package B". Imagine there is no such thing as a package manager. It is quite common to see that a package has a chain of dependencies("Package A" depends on "Package B", "Package B" depends on "Package C", the list goes on). When "Package A" requires "Package B" in order to work, we say "Package A" depends on "Package B". In most cases, packages have dependencies. Packages help our applications achieve DRY (Don't Repeat Yourself), a principle of software development, which reduces repetition of information of all kinds. In general, a block of code forms a method, a group of methods forms a class and a set of classes form a package.Ī reusable package can be dropped into any project and be used without any need to add functionality to it.Ī package exposes APIs for clients to achieve a single goal. #Modern PHP Developer - Composer #Package Manager
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