how can I take a paragraph in text format, and make any http:// url's clickable in HTML?

I have searched for Links and stuff, but cannot find anything on this particular search. I know how to tell if http:// is present in the text, but now how to make it a clickable link.

Thank you.

In reply to Creating links in the URLs in a text paragraph by Anonymous Monk

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
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