Converting URLS: Win98 anomaly?

[AndyatIES]

I'm using this code to convert urls:

// Find e-mail addresses and add a mailto <a href> tag.
$str = preg_replace(&quot;/(\w|\-|\.)+@(\w|\-)+(\.|(\w|\-)+)+/&quot;, &quot;<a href=\&quot;mailto:$0\&quot;>$0</a>&quot;, $str);

// Find URLs (starting with http or https) and add a <a href> tag.
$str = preg_replace(&quot;/http?\:\/\/\S+/&quot;, &quot;<a href=\&quot;$0\&quot;>$0</a>&quot;, $str);

Works fine on my Win95 and Unix (ISP hosted) Apache servers, but on a separate Win98 Apache setup, all I get is:

<a href=&quot;$0&quot;>$0</a>

Using the same versions of PHP, MySQL and Apache on all three locations. Have checked my PHP.ini line by line, and can see nothing to cause this failure. Any ideas?

 

[BB101]

try using \\0 instead of $0 --BB

 

[AndyatIES]

Many thanks, that sorts it. Can you tell me why? I've seen this URL conversion twice now, both times using the $(num) configuration. I'm still a PHP beginner, so I wouldn't have thought of using // from what I've read.