regular expressions problem

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Hi all,

I want replace all occurances of " dot " by .<br />

I used this code
$clean_db_text = str_replace(".", ".<br />", $clean_db_text);

But , it caused problems , when it find www.domain.com , It replaces them.I don't need that . I only want any other dot to be replaced.

I tried :

$pattern = "[^{www].[^com]";}
$replace = ".<br />";
$clean_db_text = preg_replace($pattern, $replace, $clean_db_text);

But I got the following error :
Warning: preg_replace(): Unknown modifier '\' in D:\xampp\htdocs\alaa\test_regex.php on line 16

Can someone help ?

I just wanted to say by regular expressions , any . not preceeded by "www" and not followed by "com" or "net"

$pattern = '/(?<!www)\.(?!com)/i'

Nice ! worked..

Thank you .

But that worked only for .com , How can I make it working for .com and .net .org ?

(?!com|net)

thank u v. much