title: Way to generate virtual mac address in PHP
body: <p>I am working on web application where I will need to generate demo mac address for each record. There will be plenty of records for which I will need demo mac address.<br></p>
  
  <p>So how to generate unique mac address using PHP?<br></p>
  
  <p><strong>Note -</strong> I don't want exact mac address - I will need something unique like mac address but not UUID.</p>
  
  <p>For Example - <code>00:17:88:00:00:00</code></p>