composer（管理依赖关系的工具） 及配置信息

Composer 
是 PHP 用来管理依赖（dependency）关系的工具。你可以在自己的项目中声明所依赖的外部工具库（libraries），Composer 会帮你安装这些依赖的库文件。

配置文件示例：

修改全局配置：全局配置的文件一般放在

C:\Users\XXX\AppData\Roaming\Composer\config.json； {
    "config": {},
    "repositories": [
        {
            "type": "composer",
            "url": "http://pkg.phpcomposer.com/repo/packagist/"
        },
        {
            "packagist": false
        }
    ] }

修改当前配置：即项目当前的composer.json文件；

以 laravel 项目的 composer.json 配置文件为例：

{
    "name": "laravel/laravel",
    "description": "The Laravel Framework.",
    "keywords": [
        "framework",
        "laravel"
    ],
    "license": "MIT",
    "type": "project",
    "require": {
        "laravel/framework": "4.2.*"
    },
    "autoload": {
        "classmap": [
            "app/commands",
            "app/controllers",
            "app/models",
            "app/database/migrations",
            "app/database/seeds",
            "app/tests/TestCase.php"
        ]
    },
    "scripts": {
        "post-install-cmd": [
            "php artisan clear-compiled",
            "php artisan optimize""post-update-cmd": [
                "php artisan clear-compiled",
                "php artisan optimize"
            ],
            "post-create-project-cmd": [
                "php artisan key:generate"
            ]
        },
        "config": {
            "preferred-install": "dist"
        },
        "minimum-stability": "stable",
        "repositories": [
            {
                "type": "composer",
                "url": "http://pkg.phpcomposer.com/repo/packagist/"
            },
            {
                "packagist": false
            }
        ]
    }