title: A PHP function to convert decimal ASCII to ASCII char
body: <p>I'm at a total loss, attempting to convert an decimal string, not oct, just plain decimal, which varies in character count to plain text.</p>
  
  <p>The string would look like:
  495051979899100 (123abcd)</p>
  
  <p>I could use chr() all day if I had a way to predict what the string would contain, but I really don't, so what should I do? </p>