title: How to group numbers in an array in php
body: <p>I have a loads of numbers in a string</p>
  
  <pre><code>$userlist = '12,17,46,35,32,66,43,64'; //the userlist can be as long as i want 
  
  $arr2 = explode(',', $userlist);
  </code></pre>
  
  <p>i dont now how to get them to output like the follow.</p>
  
  <pre><code>12,17
  
  46,35
  
  32,66
  
  43,64
  </code></pre>
  
  <p>Thank You for taking the time to read.</p>