ereg to format URL but NOT email

[bunner_bob]

Hi,

I found a great example of ereg_replace to add html formatting to urls that don't have them. The problem is, it also formats the "domain.com" portion of email addresses (I have another ereg_replace to take care of them). So while

www.domain.com
becomes
<a href="http://www.domain.com">www.domain.com</a>

[e-mail]
becomes
bob@<a href="http://domain.com">domain.com</a>

So I want to add something to this ereg so it only finds examples that are NOT preceded by the "@" symbol. I'm just not sure how to format it.

Here's the code as it stands (the creator broke it out into separate variables, for the sake of neatness I think):

$vdom = "[:alnum:]"; // Valid domain chars
$vurl = $vdom."_~-"; // Valid subdomain and path chars
$vura = $vurl."A-?a-y!#$%&*+,;=@."; // Valid additional parameters (after '?') chars;
									// insert other local characters if needed
$protocol = "[[:alpha:]]{3,10}://"; // Protocol exp
$server = "([$vurl]+[.])+[$vdom]+"; // Server name exp
$path = "(([$vurl]+([.][$vurl]+)*/)|([.]{1,2}/))*"; // Document path exp (/.../)
$name = "[$vurl]+([.][$vurl]+)*"; // Document name exp
$params = "[?][$vura]*"; // Additional parameters (for GET)

$output = ereg_replace("($protocol)?($server(/$path($name)?)?)", "<a href=\"http://\\2\">\\0</a>", $input); // URL into links

Any idea how to get this to do its thing only if there's NO "@" immediately before?

(Ironically, when I preview this post, I see that the PHP Builder board correctly formats the URL as a URL and the email as an email. Now if I could get that code...)

[bunner_bob]

Update:

If I rewrite the execution line thus:

$output = ereg_replace("$protocol$server(/$path($name)?)?", "<a href=\"\\0\">\\0</a>", $input);

as long as the original URL was put in with the "http://" it works fine - since emails don't have "http://" in 'em. Anything put in just "www.domain.com" doesn't get a link. And that's fine.

But I've discovered a new problem - it drops anchors (#anchor) and query-type things (?querystring) - they don't become part of the link. The original author had a "params" clause at the end, so it looks like this:

$output = ereg_replace("$protocol$server(/$path($name)?)?($params)?", "<a href=\"\\0\">\\0</a>", $input);

And I can see how that would work, but I keep getting the error "Warning: REG_ERANGE (etc)" when I add this "params" bit.

Any ideas?