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• 这种情况发生在:
  
  我要在自己的
  
ThinkPHP5.1.2

  框架中，使用
  
composer

  命令安装
  
workerMan

  拓展的时候所提示的信息

• composer 命令：
  
composer require topthink/think-worker=v2.0.9


• 提示信息
  
  

• 打印信息如下：

./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - Can only install one of: topthink/think-installer[v2.0.0, v1.0.12].
    - Can only install one of: topthink/think-installer[v2.0.0, v1.0.12].
    - Can only install one of: topthink/think-installer[v2.0.0, v1.0.12].
    - topthink/think-worker v2.0.9 requires topthink/think-installer ^2.0 -> satisfiable by topthink/think-installer[v2.0.0].
    - Installation request for topthink/think-worker v2.0.9 -> satisfiable by topthink/think-worker[v2.0.9].
    - Installation request for topthink/think-installer (locked at v1.0.12) -> satisfiable by topthink/think-installer[v1.0.12].


Installation failed, reverting ./composer.json to its original content.

• 通过对提示信息的阅读理解，说明当前的框架只让安装
  
v2.0.0, v1.0.12

  的其中一个;
  
  也就是说，当前的
  
ThinkPHP

  框架太低，不足以满足
  
v2.0.9

  版本的 workerMan;
  
  解决方案就是：
  
  
  
安装一个较低版本的 workerMan呗！