Composer is a dependency manager for PHP that allows developers to declare and install dependencies and libraries for a PHP project. It installs dependencies through the command line and manages updates. Composer supports many PHP frameworks and requires PHP to be installed. It uses semantic versioning to specify version ranges for dependencies and locks dependencies to specific versions through a composer.lock file to ensure consistent installations across projects.

1. COMPOSER(HTTPS://GETCOMPOSER.ORG/)
Make your PHP project faster and easier.

2. WHAT IS COMPOSER……?
• Composer is an application-level package manager for the PHP programming language that
provides a standard format for managing dependencies of PHP software and
required libraries. OR
• Composer is a tool for dependency management in PHP. It allows you to declare the
libraries your project depends on and it will manage (install/update) them for you.
• Composer is strongly inspired by Node.js's "npm" and Ruby's "bundler".
• Composer runs through the command line and installs dependencies (e.g. libraries) for an
application. It also allows users to install PHP applications that are available on
"Packagist"[5] which is its main repository containing available packages. It also
provides autoload capabilities for libraries that specify autoload information to ease usage of
third-party code.

3. SUPPORTED FRAMEWORK
• Symfony version 2 and later
• Laravel version 4 and later
• CodeIgniter version 3.0 and later
• CakePHP version 3.0 and later
• FuelPHP version 2.0 and later
• Drupal version 8 and later
• SilverStripe version 3.0 later
• Magento version 2.0 later
• Yii
• Zend Framework version 1 and later
• Silex (web framework)

4. REQUIREMENTS
• We need PHP to be installed in our machine.
• Ways of installing in Composer:
• 1.command line
• and 2.Manual Setup
• We need PHP to be installed in our machine.
• Ways of installing in Composer:
• 1.command line
https://getcomposer.org/download/
• and 2.Manual Setup

5. COMPOSER COMMANDS
To initialize :---- $composer init
To show packages:--- $composer show
To remove packages:--- $composer remove
To install packages:---- $composer require vendor/package_name:version
To include in project, If project uses composer:--- $composer install
Packages only for development:-- $composer require –dev [vendor/package]
To check packages outdated :-- $composer outdated

6. VERSION MANAGEMENT
1.2.3
Major release Minor release Incremental release

7. VERSION RANGES
• 0.3.2 using fixed version.
• 0.3.* is equivalent to (>=0.3 and <0.4)
• ~1.2 is equivalent to >=1.2 and <2.0.0
• ~1.2.3 is equivalent to >=1.2.3 and <1.3.0
• ^1.2.3 is equivalent to >=1.2.3 and <1.3.0

8. COMPOSER LOCK AND GIT
• Exact copy across multiple projects. Information about all the packages & what
version need to be include in particular project,so it lock to those specific version
numbers.
• Pipe ”|” when we update package, If it show’s I symbol then it indicates that it will
break package files if it updated to latest version, so try to update to incremental
version.
• Push code to GIT
Avoid push vendor folder, bcoz composer.json include all require folders with
$composer install

9. THANK YOU
ARSHAD