title: read array from 1 to 3 indexes
body: <p>Following on my project I discovered I'm doing something wrong. </p>
  
  <p><a href="https://stackoverflow.com/questions/17127738/converting-remote-relative-paths-to-absolute-paths/17127829">converting-remote-relative-paths-to-absolute-paths</a></p>
  
  <p>The question: in my rel2abs function I have the following array:</p>
  
  <blockquote>
    <p>Array ( [0] => [1] => a [2] => 1371147400 [3] => t1 [4] => css [5] => t1_core_logged_out.bundle.css )</p>
  </blockquote>
  
  <p>I'm able to compute the index of which I should start reading from, but I also need the preceding values. the path I'm building should be read from index number 3, but the string I'm building should be the values between 1 and 3; which would output:</p>
  
  <blockquote>
    <p>a/1371147400/t1</p>
  </blockquote>
  
  <p>What would be the best way to do that?  </p>