Parsing URL in text

localhost · 08-14-2008, 01:27 PM

Hello,

I have paragraphs of text in a database, and I am trying to convert the url's to proper links, e.g. :
This site Google is cool
would be : This site Google is cool

and the same if they had http:// on.

So far my code isn't working, so please I would be grateful if someone could help me achieve above.

Many Thanks,

Steven Gibbons

PHP Code:


			
if(!empty($data)) {

$url = mysql_real_escape_string($_POST['url']);

$text = preg_replace('@(https?://([-\w\.]+)+(:\d+)?(/([\w/_\.]*(\?\S+)?)?)?)@', '<a href="$1">$1</a>', $url);

echo $text;

}

delayedinsanity · 08-14-2008, 02:35 PM

PHP Code:


			
$this->_string = preg_replace('~((https?|ftp)\://[a-z0-9+_-]+(\.[a-z0-9+_-]+)*(/([a-z0-9+_-]\.?)+)*/?(\?[a-z+&_.-][a-z0-9;:@/&%=+$_.-]*)?(#[a-z_.-][a-z0-9+_.-]*)?)~is', '<a href="$1">$1</a>', $this->_string);

Has been working for me... doesn't parse the URLs title like vBulletins parser, but I still think it's a good start.

Looks for web or ftp protocols, handles top level and sub-domains with ease, with any number of sub-directories, a query string, or an anchor.
-m

localhost · 08-14-2008, 02:42 PM

Thanks for your reply. I will give it a go.

localhost · 08-14-2008, 02:47 PM

Thanks for your reply. The only problem I am having now is it only works with http:// not just www.

Thanks,

Steve

delayedinsanity · 08-14-2008, 06:51 PM

Well, I suppose you could do this:

PHP Code:


			
$string = preg_replace('~(((https?|ftp)\://)?(www\.)?[a-z0-9+_-]+(\.[a-z0-9+_-]+)*(/([a-z0-9+_-]\.?)+)*/?(\?[a-z+&_.-][a-z0-9;:@/&%=+$_.-]*)?(#[a-z_.-][a-z0-9+_.-]*)?)~is', '<a href="$1">$1</a>', $string);

I would actually consider this a fairly good regular expression to learn from, because although it looks complex to those who are new or completely foreign to regexps, it's actually a really easy regexp to break down once you start learning how they work - probably just as easy to modify and optimize as well, I just put it together in a rather quick fashion a while back and haven't touched it since.

If you're interested;

TalkPHP - Search Results
Regular-Expressions.info - Regex Tutorial, Examples and Reference - Regexp Patterns
Regular Expression Library
Regular Expressions Cheat Sheet (V2) - Cheat Sheets - Added Bytes
-m