title: PHP Implode with breakpoints
body: <p>Is there a way to implode with breakpoints</p>
  
  <pre><code>$a1 = array('a1','a2','a3','a4');
  implode("&lt;br/&gt;",$a1);
  </code></pre>
  
  <p>I am expecting the output something like this</p>
  
  <pre><code>a1&lt;br/&gt;
  a2&lt;br/&gt;
  a3&lt;br/&gt;
  a4&lt;br/&gt;
  </code></pre>
  
  <p>I am getting Warning: implode() [function.implode]: Invalid arguments passed</p>