title: Add a space after a specific character with php
body: <p>I tried Googling and nothing helped. I'm inexperienced with PHP. I hope question is clear. </p>
  
  <p>So what I want is to put a space after a specific character in a string</p>
  
  <p>like from:</p>
  
  <pre><code>1234b1
  </code></pre>
  
  <p>to:</p>
  
  <pre><code>1234b 1
  </code></pre>
  
  <p>I need a code to do it for me</p>
  
  <p><strong>NOTE:</strong> No need to spoon-feed me.</p>