• Keeping dependency code
• Up to date
• Out of version control
• require() gets old

• Dependency manager
• Not a package manager
•  
• Inspired by
• npm
• ruby's bundler
•  
• a CLI tool

• Composer central repository
• 19 854 packages registered
  
• December 12th 2013

$ curl -sS https://getcomposer.org/installer | php

 $ composer self-update
Updating to version ae3b7ad5c07d1df35cf4c2d.
    Downloading: 100%

$ cd <your-project>$ composer init[...] Follow step-by-step guide$ cat composer.json$ composer install

 {
  "name": "imbo/imboclient",
  "require": {
    "php": ">=5.3.2",
    "guzzle/guzzle": "~3.7.4"
  },
  "require-dev": {
    "phpunit/phpunit": "3.7.*"
  },
  "autoload": {
    "psr-0": {
      "ImboClient": "library"
    }
  },
  "description": "PHP client for the Imbo-project",
  "keywords": ["image storage", "image transformation"],
  "license": "MIT",
  "authors": [{
      "name": "Christer Edvartsen"
  }],
  "support": {
    "issues": "https://github.com/imbo/imboclient-php/issues",
    "irc": "irc://irc.freenode.net/imbo"
  }
}

• Generated on install
  
• Ensures same versions
• Updated by composer update
• Add it to version control!

• Composer encourages semver
• X.Y.Z / X.Y
• Supports a range of version selectors
• >= 1.2.0
• >= 1.2.4, <=1.4.0
• 1.2.*
• ~1.2.4

• require() is for suckers
• Define an autoloader type
• PSR-0
• Classmap
• Specific files

<?php
require BASE_PATH . '/vendor/autoload.php';

use ImboClient\Client as ImboClient,
    Silex\Application;

$imbo = new ImboClient();
$app = new Application();

• Basically just a JSON file
• Satis will get you started
• Define repository in projects:

$ composer create-project imbo/imbo

• Installs package
• Installs dependencies
• Nice for skeletons etc

• Run PHP-code
• ...or shell commands
• Lots of flexibility

• Sign up on packagist.org
• Add your repository URL
• If using Github, add service hook
• Packagist updated on every push
• Do it! Share your stuff!