What is the Composer
Composer is PHP dependency management tool. It allows you to declare the project relies code base, it will install them for you in your project. It is similar in Ruby Gem, and node.js in NPM.
Why Composer
Use existing PHP code method / library. Previous methods: copy / paste, include, require.
Composer: management project dependencies, automatic loading and so on.
Installation Composer
Linux, MacOS
php -r "copy('https://install.phpcomposer.com/installer', 'composer-setup.php');"
php composer-setup.php
sudo mv -i composer.phar /usr/local/bin/composer
Windows
Download and run the Composer-Setup.exe, it will install the latest version of Composer, and set system environment variables, so you can directly use the composer command in any directory.
Modify the source for domestic mirror
composer config -g repo.packagist composer https://mirrors.aliyun.com/composer/
The basic use Composer
the init Composer
Composer The require [Package Penalty for name] installation package
Composer install
Composer Update [Package Penalty for name] update package
Composer the Remove [Package Penalty for name]
Composer config the -gl view the global configuration
composer show lists the current project to package information
Automatically load
Only need to add the following line to guide your project file:
require 'vendor/autoload.php';
