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Help with Regular Expression

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Old 09-26-08, 02:20 AM
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Help with Regular Expression

Hi all,
I am trying to make up a regular expression.

The purpose of this regular expression will be to scan text and look out for any URL that looks like -

Code:
www.abc.com
abc.com
http://abc.com
http://www.abc.com
and put anchor tags in against these URLs.

The text block can be any long.

Please, any help will be greatly appreciated.
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Old 09-26-08, 08:32 AM
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I think this ought to do it:

(http://)*(www\.)*abc.com
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Old 09-26-08, 04:08 PM
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PHP Code:

// List the file as a link, so it can easily be viewed and checked

echo "<a href=\"$url\" target=\"_blank\">$url</a><br />\n";


 
// This is used to extract all the references from src, href, url, action, and window.opens
$ref=run_preg($text,"/(?:(?:src|href|url|action|window.open|popup)+\s*[=\(]+\s*[\"'`]*)([\+\w:?=@&\/#._;-]+)(?:[\s\"'`])/i");

function 
run_preg($text,$pattern)
{
   
// Handles the preg for the scan
   
preg_match_all ($pattern$text$matches);

   return (
is_array($matches)) ? $matches[1]:FALSE;

These are extracts out of robots.spider (http://robots-wizard.com/robots.spider/), download the code at http://robots-wizard.com/robots.spider.tar.gz.
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Old 09-29-08, 07:25 AM
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Thanx for posting, guys.

While using the method provided by End User of, I devised the following function

PHP Code:

preg_replace('/(http:\/\/)*(www\.)*[a-zA-Z0-9]+\.[a-zA-Z]{3,4}/''<a href="index.php">http://$2$3$4</a>',html_entity_decode($newContent)) 

But the problem still persists, I am not able to catch the string that was replaced. $& doesn't catch either.
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