Packagist

The PHP Package Repository

Composer 提供php專案開發時，套件、函式庫的相依性管理，也提供函式庫函式的下載安裝，Composer 取用套件時預設的來源庫( Repository )就是Packagist，我們可以在Packagist 尋找適合的套件應用在我們的專案裡，或者參考這些套件的開源碼。如同GitHub一樣，Packagist也提供付費版本的 private packagist。

How to submit packages?

我們也可以貢獻自己開發的開源函式庫套件，原則上您需要建立一組Packagist帳號，並綁定GitHub帳號，並依照Composer專案宣告方式製作套件(如下)，並push到Packagist即可。

先為您的套件取一個獨一無二的名稱　( Vendor name / project name )

這是很重要的步驟，因為之後無法再修改，以下是取名原則的參考：

// Monolog is a library, so the vendor name and package name are the same.

monolog/monolog

// That could be the name of a drupal module (maintained/provided by monolog,

// if the drupal team did it, the vendor would be drupal).

monolog/monolog-drupal-module

// Acme is a company or person here, they can name their package with a common name (Email).

// As long as it's in their own vendor namespace it does not conflict with anyone else.

acme/email

產生一個composer.json

composer.json檔描述一個專案相依引用的套件名稱、版本範圍、套件，以及自動載入的PSR標準等，相同地在自己開發的套件也需要產生composer.json來描述，格式如下：

{

"name": "monolog/monolog",
"type": "library",
"description": "Logging for PHP 5.3",
"keywords": \["log","logging"\],
"homepage": "https://github.com/Seldaek/monolog",
"license": "MIT",
"authors": \[
    {
        "name": "Jordi Boggiano",
        "email": "[email protected]",
        "homepage": "http://seld.be",
        "role": "Developer"
    }
\],
"require": {
    "php": ">=5.3.0"
},
"autoload": {
    "psr-0": {
        "Monolog": "src"
    }
}

}

How to update packages?