php成长之路--1.composer下载依赖

ゝ一世哀愁。 2022-01-27 04:55 455阅读 0赞

### composer ###

*  composer
 *   *  1.composer
     *   *  1.1 安装
         *  1.2 packagist
     *  1.3 使用composer库
 *  yaf+yar企业微服务解决方案

# composer #

## 1.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。

[**composer官网**][composer]

### 1.1 安装 ###

*  **Linux / Unix / macOS系统**

#下载
    php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
    php -r "if (hash_file('sha384', 'composer-setup.php') === '48e3236262b34d30969dca3c37281b3b4bbe3221bda826ac6a9a62d6444cdb0dcd0615698a5cbe587c3f0fe57a54d8f5') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
    
    #本地安装
     php composer-setup.php --install-dir=bin --filename=composer
     #全局安装
     mv composer /usr/bin/composer

*  **windows系统**  
    [composer-setup.exe][]

### 1.2 packagist ###

Packagist 是主要的Composer仓库。它集合了与Composer一起安装的公开 PHP 软件包。

[packagist][]  
[packagist中文网][packagist 1]

*  packagist搜索软件包  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2pocTAxMTM_size_16_color_FFFFFF_t_70]  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2pocTAxMTM_size_16_color_FFFFFF_t_70 1]  
    \*利用composer下载guzzle库

#此过程很慢会经历几分钟
    [jianghaiqiangdeMacBook-Air:composer qiang$ composer require guzzlehttp/guzzle
    
    Using version ^6.3 for guzzlehttp/guzzle
    ./composer.json has been created
    Loading composer repositories with package information
    Updating dependencies (including require-dev)
    Package operations: 5 installs, 0 updates, 0 removals
      - Installing guzzlehttp/promises (v1.3.1): Downloading (100%)         
      - Installing ralouphie/getallheaders (2.0.5): Downloading (100%)         
      - Installing psr/http-message (1.0.1): Downloading (100%)         
      - Installing guzzlehttp/psr7 (1.5.2): Downloading (100%)         
      - Installing guzzlehttp/guzzle (6.3.3): Downloading (100%)         
    guzzlehttp/guzzle suggests installing psr/log (Required for using the Log middleware)
    Writing lock file
    Generating autoload files
    
    #composer生成目录及文件
    [jianghaiqiangdeMacBook-Air:composer qiang$ ls
    composer.json	composer.lock	vendor
    
    #查看composer.json
    [jianghaiqiangdeMacBook-Air:composer qiang$ cat composer.json 
    { 
        "require": { 
            "guzzlehttp/guzzle": "^6.3"
        }
    }
    
    #查看vendor目录
    [jianghaiqiangdeMacBook-Air:composer qiang$ ls ./vendor/
    autoload.php	composer	guzzlehttp	psr		ralouphie

## 1.3 使用composer库 ##

在你的入口require ./vendor/autoload.php文件即可，引入autoload.php后，vendor目录下的所有类都会依据[psr-4][]自动加载,在我们自己的应用中可以直接使用。如：

[jianghaiqiangdeMacBook-Air:composer qiang$ vim index.php
    <?php 
    
    require __DIR__.'/vendor/autoload.php';
    
    #即可直接使用所有vendor目录下的所有类

# [yaf+yar企业微服务解决方案][yaf_yar] #

[composer]: https://www.phpcomposer.com
[composer-setup.exe]: https://getcomposer.org/Composer-Setup.exe
[packagist]: https://packagist.org
[packagist 1]: http://packagist.p2hp.com
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2pocTAxMTM_size_16_color_FFFFFF_t_70]: /images/20220127/bc8f5c2924014b91aca8eb4ca3e9533a.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2pocTAxMTM_size_16_color_FFFFFF_t_70 1]: /images/20220127/46d28f76d1034b4b8fb9df38de550d9f.png
[psr-4]: https://learnku.com/laravel/t/2081/psr-specification-psr-4-automatic-loading-specification
[yaf_yar]: https://edu.csdn.net/course/detail/9933