title: Create unique id with a length of 5 in PHP
body: <p>I know the <code>uniqid()</code> method to create lots of unique ids with a length of 7 or more, but what I want to create is a length of 5 unique id with no collision.</p>
  
  <p>Is it possible to create 220.000 unique id's with a length of 5 and check if there is any collision?</p>