title: How do I linkify urls in a string with php?
body: <p>I have the following string:</p>
  
  <pre><code>"Look on http://www.google.com".
  </code></pre>
  
  <p>I need to convert it to:</p>
  
  <blockquote>
    <p>"Look on <a href="http://www.google.com" rel="noreferrer">http://www.google.com</a>"</p>
  </blockquote>
  
  <p>The original string can have more than 1 URL string.</p>
  
  <p>How do I do this in php?</p>
  
  <p>Thanks</p>