Identifying if a URL is present in a string

Question

Hi can someone help me identify if a url is present in a string using PHP?

I want to pull in a full string i.e. "Hi please visit http://domain.com/12345 today" and strip out the full url not just the domain name.

Thanks

Answer 1

here's an example

$str = file_get_contents('http://www.sitepoint.com');

preg_match_all('~(https?://([-\w\.]+)+(:\d+)?(/([\w/_\.]*(\?\S+)?)?)?)~', $str, $matches);

print_r($matches);

Answer 2

Take a look at this article from Jeff Atwood's blog "Coding Horror":

The Problem With URLs