Use Composer to manage dependent libraries

The followingcomposer commanduses the tutorial column to introduce you to using Composer to manage dependent libraries. I hope it will be helpful to friends in need!

Introduction

Composer is a dependency management tool for PHP. The advantage of Composer is that you only need to provide a composer.json file to declare the dependency libraries you need to use, and then a simple command can install all its dependencies, which facilitates the deployment and release of applications and says goodbye to manual download management. trouble.

Installation

Linux

You can execute the following commands to install Composer on your system.

$ curl -sS https://getcomposer.org/installer | php $ mv composer.phar /usr/local/bin/composer

Note

If the above command fails to execute due to permissions, please use sudo to try running the mv command again.

Windows

Download and run Composer-Setup.exe, it will install the latest version of Composer and set the system environment variables, so you can run it in any directory Use the composer command directly.

After installation using

, Composer will add a composer command to the system, which is the entrance to all management functions of Composer.

You can directly use the composer require command to install third-party libraries and add dependencies to the composer.json description file.

$ composer require monolog/monolog

Composer will install all dependent packages into the vendor directory of the application. In addition to downloading the library, Composer also prepares an automatic loading file, which can load all class files in the library downloaded by Composer. To use it, you just need to add the following line of code to your application's bootstrap file to use these libraries.

require 'vendor/autoload.php';

In addition, you can search for the library you want at https://packagist.org/ and use Composer to install it.

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