title: Get substring from specific position to last occurring number in string
body: <pre><code>$str = &quot;234 567 some text following&quot;;
  </code></pre>
  <p>How do I get a substring from the third char in the string to the last number?</p>
  <pre><code>$positionOfNewLeadingCharacter = 3;
  </code></pre>
  <p>In the above example, I want the substring <code>4 567</code> to be returned, not from the third char to the end of the string.  <code>7</code> is the last occurring digit in the sample string.</p>
  <p>The strings in my real application might be a mix of text and numbers. I need to extract the substring FROM a known position TO the position of the last occurring number.</p>