title: guzzle installation via composer
body: <p>recently I've started one project and want to use <code>elasticsearch</code>. But when I want to install <code>guzzle</code> for <code>PHP</code> via <code>composer</code>, I get folowing error. I have no idea what is this error.</p>
  
  <p><img src="https://i.stack.imgur.com/52UhC.png" alt="enter image description here"></p>
  
  <p>My composer required packages are:</p>
  
  <pre><code>"require":{
      "yiisoft/yii":"1.1.14",
      "2amigos/yiiwheels":"1.0.3",
      "clevertech/yii-booster": "4.0.1",
      "drmabuse/yii-bootstrap-3-module": "dev-master",
      "guzzle/guzzle": "3.9.0",
      "elasticsearch/elasticsearch": "1.2.2"
    },
  </code></pre>
  
  <p>my <code>PHP Version 5.4.7</code></p>
  
  <p>my <a href="https://www.dropbox.com/s/wx7h10xxn5mrfjt/composer.json?dl=0" rel="nofollow noreferrer">composer.json</a> file</p>