title: how to install php 5.4 install on ubuntu desktop 12.04?
body: <p>I try to install php5 package with a specific version 5.4.</p>
  
  <p>But I have problem and can not solve it myself. When I try to install :</p>
  
  <pre><code>"apt-get install php5=5.4.9-4ubuntu2"
  </code></pre>
  
  <p>It returns me an error:</p>
  
  <blockquote>
    <p>E: Version '5.4.9-4ubuntu2' for 'php5' was not found.</p>
  </blockquote>
  
  <p>How can I solve this task?</p>