Composer is the dependency manager for PHP and you are on a one-page-only documentation for this tool. Official documentation is on the official website, this page just brings you the essential.
curl -sS https://getcomposer.org/installer | php
or
Make composer global
php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
php -r "if (hash_file('SHA384', 'composer-setup.php') === 'aa96f26c2b67226a324c27919f1eb05f21c248b987e6195cad9690d5c1ff713d53020a02ac8c217dbf90a7eacc9d141d') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
php composer-setup.php --install-dir=/usr/local/bin --filename=composer
php -r "unlink('composer-setup.php');"
composer.phar most needed command line
$ composer require vendor-name/package-name
Adds required packages to your composer.json and installs them. The require command adds new packages to the composer.json file from the current directory. After adding/changing the requirements, the modified requirements will be installed or updated.
$ composer install
Parses the composer.json file and downloads the needed dependencies.
$ composer update $ composer update --lock $ composer dump-autoload --optimize
$ composer about $ composer archive $ composer browse $ composer clear-cache $ composer config --list $ composer create-project symfony/standard-edition dir/ $ composer depends vendor-name/package-name $ composer diagnose $ composer exec $ composer global $ composer help $ composer info $ composer init $ composer licenses $ composer list $ composer outdated $ composer prohibits $ composer remove $ composer run-script $ composer search my keywords $ composer self-update $ composer show $ composer status $ composer suggests $ composer validate
{ "name": "vendor-name/project-name", "description": "This is a very cool package!", "version": "0.3.0", "type": "library", "keywords": ["logging", "cool", "awesome"], "homepage": "https://jolicode.com", "time": "2012-12-21", "license": "MIT", "authors": [ { "name": "Xavier Lacot", "email": "[email protected]", "homepage": "http://www.lacot.org", "role": "Developer" }, { "name": "Benjamin Clay", "email": "[email protected]", "homepage": "https://github.com/ternel", "role": "Developer" } ], "support": { "email": "[email protected]", "issues": "https://github.com/jolicode/jane/issues", "forum": "http://www.my-forum.com/", "wiki": "http://www.my-wiki.com/", "irc": "irc://irc.freenode.org/composer", "source": "https://github.com/jolicode/jane", "docs": "https://github.com/jolicode/jane/wiki" }, "require": { "monolog/monolog": "1.0.", "joli/ternel": "@dev", "joli/ternel-bundle": "@stable", "joli/semver": "^2.0", "joli/package": ">=1.0 <1.1", "acme/foo": "dev-master#2eb0c097" }, "require-dev": { "debug/dev-only": "1.0." }, "conflict": { "another-vendor/conflict": "1.0." }, "replace": { "debug/dev-only": "1.0." }, "provide": { "debug/dev-only": "1.0." }, "suggest": { "jolicode/gif-exception-bundle": "For fun!" }, "autoload": { "psr-4": { "Monolog\": "src/", "Vendor\Namespace\": "" }, "psr-0": { "Monolog": "src/", "Vendor\Namespace": ["src/", "lib/"], "Pear_Style": "src/", "": "src/" }, "classmap": ["src/", "lib/", "Something.php"], "files": ["src/MyLibrary/functions.php"] }, "autoload-dev": { "psr-0": { "MyPackage\Tests": "test/" } }, "target-dir": "Symfony/Component/Yaml", "minimum-stability": "stable", "repositories": [ { "type": "composer", "url": "http://packages.example.com" }, { "type": "vcs", "url": "https://github.com/Seldaek/monolog" }, { "type": "pear", "url": "http://pear2.php.net" }, { "type": "package", "package": { "name": "smarty/smarty", "version": "3.1.7", "dist": { "url": "http://www.smarty.net/Smarty-3.1.7.zip", "type": "zip" }, "source": { "url": "http://smarty-php.googlecode.com/svn/", "type": "svn", "reference": "tags/Smarty_3_1_7/distribution/" } } }, { "type": "artifact", "url": "path/to/directory/with/zips/" }, { "type": "path", "url": "../../packages/my-package" } ], "config": { "process-timeout": 300, "use-include-path": false, "preferred-install": "auto", "store-auths": "prompt", "github-protocols": ["git", "https", "http"], "github-oauth": {"github.com": "oauthtoken"}, "gitlab-oauth": {"gitlab.com": "oauthtoken"}, "github-domains": ["entreprise-github.me.com"], "gitlab-domains": ["entreprise-gitlab.me.com"], "github-expose-hostname": true, "disable-tls": false, "cafile": "/var/certif.ca", "capath": "/var/", "http-basic": {"me.io":{"username":"foo","password":"bar"}, "platform": {"php": "5.4", "ext-something": "4.0"}, "vendor-dir": "vendor", "bin-dir": "bin", "data-dir": "/home/ternel/here", "cache-dir": "$home/cache", "cache-files-dir": "$cache-dir/files", "cache-repo-dir": "$cache-dir/repo", "cache-vcs-dir": "$cache-dir/vcs", "cache-files-ttl": 15552000, "cache-files-maxsize": "300MiB", "bin-compat": "auto", "prepend-autoloader": true, "autoloader-suffix": "pony", "optimize-autoloader": false, "sort-packages": false, "classmap-authoritative": false, "notify-on-install": true, "discard-changes": false, "archive-format": "tar", "archive-dir": "." }, "archive": { "exclude": ["/foo/bar", "baz", "/.test", "!/foo/bar/baz"] }, "prefer-stable": true, "scripts": { "pre-install-cmd": "MyVendor\MyClass::doSomething", "post-install-cmd": [ "MyVendor\MyClass::warmCache", "phpunit -c app/" ], "pre-update-cmd": "MyVendor\MyClass::doSomething", "post-update-cmd": "MyVendor\MyClass::doSomething", "pre-status-cmd": "MyVendor\MyClass::doSomething", "post-status-cmd": "MyVendor\MyClass::doSomething", "pre-package-install": "MyVendor\MyClass::doSomething", "post-package-install": [ "MyVendor\MyClass::postPackageInstall" ], "pre-package-update": "MyVendor\MyClass::doSomething", "post-package-update": "MyVendor\MyClass::doSomething", "pre-package-uninstall": "MyVendor\MyClass::doSomething", "post-package-uninstall": "MyVendor\MyClass::doSomething", "pre-autoload-dump": "MyVendor\MyClass::doSomething", "post-autoload-dump": "MyVendor\MyClass::doSomething", "post-root-package-install": "MyVendor\MyClass::doStuff", "post-create-project-cmd": "MyVendor\MyClass::doThis", "pre-archive-cmd": "MyVendor\MyClass::doSomething", "post-archive-cmd": "MyVendor\MyClass::doSomething", }, "extra": { "key": "value" }, "bin": ["./bin/toto"] }