How to parse text, identify URL and append word at end?

Hi PHPers,
Suppose I have got a text file which contains text like

Welcome
some text http://example.com/sdsada/ some text
Some more words
Some text http://example.com/sdsada/asdsads some text
..
..
..

Code (markup):

I want to read this file in php and convert it automatically to something like

Welcome
some text <a href="http://example.com/sdsada/mytext">http://example.com/sdsada/</a> some text
Some more words
Some text <a href="http://example.com/sdsada/asdsads/mytext">http://example.com/sdsada/asdsads/</a> some text
..
..
..

Code (markup):

Your help is much appreciated.

 

That is easy:

<?php
$filename = 'test.txt';
$outputfile = 'newfile.txt';
$data = file_get_contents($filename);
$data =
preg_replace('@(https?://([-\w\.]+[-\w])+(:\d+)?(/([\w/_\.#-]*(\?\S+)?[^\.\s])?)?)@','<a href="$1" target="_blank">$1</a>', $data);
file_put_contents($outputfile, $data);

PHP:

 

possible non-regex solution:
1. explode it
2. run each word through a FILTER (URL or something)
3. if it is a URL simply append a tag

 

will the 'some text' before the href always be the same?
if so you could do string replace ..to replace the 'some text' and white space with the new formatting.
simple fix