“Composer (software)”的意思、由来-开放百科全书

词条 Composer (software)

释义

Syntax
Commands Libraries definition Versions
Supported framework
See also
References
External links

{{Infobox software
| name = Composer
| logo = Logo-composer-transparent.png
| logo size = 120px
| screenshot =
| caption =
| author =
| developer = Nils Adermann,
Jordi Boggiano
| released = {{release date and age|2012|03|01}}^[1]
| latest release version = 1.8.4
| latest release date = {{release date and age|2019|02|11}}^[1]
| latest preview version =
| latest preview date =
| programming language = PHP
| operating system = Cross-platform
| platform =
| language =
| genre = Package manager
| license = MIT License
| website = {{URL|http://getcomposer.org/}}
}}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. It was developed by Nils Adermann and Jordi Boggiano, who continue to manage the project. They began development in April 2011 and first released it on March 1, 2012.^[2] Composer is strongly inspired by Node.js's "npm" and Ruby's "bundler".^[3] The project's dependency solving algorithm started out as a PHP-based port of openSUSE's libzypp satsolver.^[4]

Composer runs from 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.

Syntax

Commands

Composer offers several parameters including :^[6]

require: add the library in parameter to the file composer.json, and install it.
install: install all libraries from composer.json. It's the command to use to download all PHP repository dependencies.
update: update all libraries from composer.json, according to the allowed versions mentioned into it.
remove: uninstall a library and remove it from composer.json.

Libraries definition

Example of composer.json generated by the following command:

{

    "require": {        "monolog/monolog": "1.2.*"    }

}

Versions

The different authorized versions of the libraries are defined by:^[7]

Symbol	Role (placed before a version number)	Example
>=	allows to extend the number. Moreover, we can use: >, <, <=.	`"php": ">=5.5.9"` includes PHP 7.
!=	excludes a version.
-	defines a range of versions.
¦¦	add possibles versions.	`"symfony/symfony": "2.8 ¦¦ 3.0"` regroups only these two versions.
*	extends to all subversions.	`"symfony/symfony": "3.1.*"` includes the 3.1.1.
~	extends to the next versions of the same level.	`"doctrine/orm": "~2.5"` also concerns the 2.6, but neither the 2.4 nor the 3.0.
^	same as tilde, only if there is a backward compatibility.

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
TYPO3 version 6.2 and later
SilverStripe version 3.0 later
Magento version 2.0 later
Yii version 1.1 and later
Zend Framework version 1 and later
Silex (web framework)
Lumen (web framework)

References

1. ^[https://getcomposer.org/download/ Composer download list]
2. ^¹[https://github.com/composer/composer/releases/tag/1.0.0-alpha1 Software release], github.com, Retrieved April 24, 2016.
3. ^[https://getcomposer.org/doc/00-intro.md#dependency-management Getting Started/Dependency management], getcomposer.org, Retrieved November 28, 2013.
4. ^[https://github.com/composer/composer#acknowledgments Composer acknowledgements]
5. ^See [https://packagist.org/ packagist.org]
6. ^{{cite web|url=https://getcomposer.org/doc/03-cli.md|title=Command-line interface / Commands |website=getcomposer.org}}
7. ^{{cite web|title=Versions and constraints - Composer|url=https://getcomposer.org/doc/articles/versions.md|website=getcomposer.org}}

External links

{{Official website|https://getcomposer.org/}}
[https://github.com/composer/composer Composer on GitHub]
[https://getcomposer.org/doc/ Composer documentation]
[https://www.codementor.io/php/tutorial/composer-install-php-dependency-manager Composer Tutorial]
[https://www.onlineinterviewquestions.com/creating-installer-laravel-project/ Automate basic composer tasks in Laravel]
[https://packagist.org/ Packagist - the main Composer repository]
{{Openhub|composer|Composer}}

3 : Free package management systems|Free software programmed in PHP|PHP software

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