创建自己的composer包-优快云博客

本文链接：https://blog.youkuaiyun.com/dcj3sjt126com/article/details/84755770

本文详细介绍如何在GitHub上创建并配置一个Composer包，包括初始化、设置composer.json文件、定义命名空间和目录结构，以及如何测试包的功能。

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创建一个composer/packagist包

在github上面创建一个新库，这里取名car, 初始化readme.md, 然后克隆到本地：

git clone https://github.com/maxwelldu/car.git
cd car

这里的car文件夹就是包的root目录了，只需要记住composer.json在包的哪个目录下面，一般那就是包的root目录了。

现在还没有composer.json文件，可以通过命令： composer init, 中括号里面的为默认值，如果直接回车将使用里面的值

➜  car git:(master) composer init


  Welcome to the Composer config generator



This command will guide you through creating your composer.json config.

Package name (<vendor>/<name>) [maxwelldu/car]:
Description []: composer study
Author [maxwelldu <dcj3sjt@163.com>]:
Minimum Stability []:
Package Type []:
License []:

Define your dependencies.

Would you like to define your dependencies (require) interactively [yes]? no
Would you like to define your dev dependencies (require-dev) interactively [yes]? no
<?php

<?php
{
<?php
    "name": "maxwelldu/car",
namespace Ford\Fusion;
    "description": "composer study",
    "authors": [
        {
            "name": "maxwelldu",
            "email": "dcj3sjt@163.com"
        }
    ],
    "require": {}
}

Do you confirm generation [yes]? yes

将composer.json修改成如下：

{
    "name": "maxwelldu/car",
    "description": "composer study",
    "license": "MIT",
    "authors": [
        {
            "name": "maxwelldu",
            "email": "dcj3sjt@163.com"
        }
    ],
    "minimum-stability": "dev",
    "require": {
        "php": ">=5.3.0"
    },
    "autoload": {
        "psr-4": {
            "Ford\\Escape\\": "src/Ford/Escape",
            "Ford\\Fusion\\": "src/Ford/Fusion",
            "Ford\\Focus\\": "src/Ford/Focus",
            "Ford\\Fiesta\\": "src/Ford/Fiesta"
        }
    }
}

根据上面的命名空间和目录的映射关系，包的结构现在应该是这样：

|____.gitignore

|____composer.json

|____composer.lock

|____README.md

|____src

| |____Ford

| | |____Escape

| | | |____Escape2013.php

| | |____Fiesta

| | | |____Fiesta2013.php

| | |____Focus

| | | |____Focus2013.php

| | |____Fusion

| | | |____Fusion2013.php

Escape2013.php

<?php
  
namespace Ford\Escape;
  
class Escape2013
{
    public static function info()
    {
        echo "This is Ford Escape2013!<br />";
    }
}

Fiesta2013.php

<?php
  
namespace Ford\Fiesta;
  
class Fiesta2013
{
    public static function info()
    {
        echo "This is Ford Fiesta2013!<br />";
    }
}

Focus2013.php

<?php
  
namespace Ford\Focus;
  
class Focus2013
{
    public static function info()
    {
        echo "This is Ford Focus2013!<br />";
    }
}

Fusion2013.php

<?php
  
namespace Ford\Fusion;
  
class Fusion2013
{
    public static function info()
    {
        echo "This is Ford Fusion2013!<br />";
    }
}

以上都梳理完毕后，需要安装composer来测试我们的包是否可以正常工作，安装它很简单在包的root目录下install即可：

composer install

安装后会在vendor/composer/autoload_psr4.php中生成命名空间和目录的映射关系，被包在一个数组中：

<?php

// autoload_psr4.php @generated by Composer

$vendorDir = dirname(dirname(__FILE__));
$baseDir = dirname($vendorDir);

return array(
    'Ford\\Fusion\\' => array($baseDir . '/src/Ford/Fusion'),
    'Ford\\Focus\\' => array($baseDir . '/src/Ford/Focus'),
    'Ford\\Fiesta\\' => array($baseDir . '/src/Ford/Fiesta'),
    'Ford\\Escape\\' => array($baseDir . '/src/Ford/Escape'),
);

然后我们新建一个测试文件show.php,用以下内容填充：

<?php

require 'vendor/autoload.php';

use Ford\Escape as Escape;
use Ford\Fiesta as Fiesta;
use Ford\Focus as Focus;
use Ford\Fusion as Fusion;

echo Escape\Escape2013::info();
echo Fiesta\Fiesta2013::info();
echo Focus\Focus2013::info();
echo Fusion\Fusion2013::info();

然后在当前目录启动一个服务器