title: Display output in parts in PHP
body: <p>I have this code:</p>
  
  <pre><code>&lt;?php
  for($i = 0; $i&lt;30; $i++)
  {
      echo "$i&lt;br&gt;";          
      usleep(100000); 
  }
  
  ?&gt;
  </code></pre>
  
  <p>I would like to know how make the browser display 0, then 1, then 2, ...</p>
  
  <p>In my example, it loads for a while and then display 0-29.</p>