title: Parsing this string with regex PHP
body: <p>I have string in format as below:</p>
  
  <p>ABC 318 XY2388</p>
  
  <p>I tried to use preg replace function in PHP with Regex but having no knowledge of reg ex I am not getting anywhere.</p>
  
  <p>I want above string to end up like ABC 318/XY 2388</p>
  
  <p>So the rule is:</p>
  
  <ul>
  <li>Keep the first ABC (first batch of letters) untouched.</li>
  <li>Put a space between letter(s) and number occurring after ABC.</li>
  <li>replace space between second batch of numbers and letters with forward slash</li>
  </ul>
  
  <p>I will appreciate any help on this.</p>