External vs. internal links

zzz

I use this function to check for links in posts. If a user clicks a link I redirect them to a page that warns users that the link takes them away from the site.

I need to modify this function in such a way that if the link if withing my domain, simply turn it into a regular link. Need help.


// alert about externallink
function url2link($extUrlStr) {
	// if cookie set -- bypass aler screen and take directly to the external page
	if ($_COOKIE['externalLink'] == $_SESSION['member_id']) {
		$setUrl = preg_replace("/(http:\/\/|(www\.))(([^\s<]{4,68})[^\s<]*)/", '<a href="http://$2$3" rel="nofollow" target="_blank">$2$4</a>', $extUrlStr);
	} else {
		$setUrl = preg_replace("/(http:\/\/|(www\.))(([^\s<]{4,68})[^\s<]*)/", '<a href="/link/$2$3" rel="nofollow">$2$4</a>', $extUrlStr);
	}
	return $setUrl;
}

dagon

not an answer to your question, but I do so hate sites that do that, you don't need to tell me, I can work it out for myself. I'm not even user what you hope to achieve by doing it, but if its to have me never visit again - you succeeded.

sandthipe

you could check for strpos("the_link","your_domain"). check out the php manual at php.net for a quick and easy reference on strpos()

zzz

dagon;10945946 wrote:
not an answer to your question, but I do so hate sites that do that, you don't need to tell me, I can work it out for myself. I'm not even user what you hope to achieve by doing it, but if its to have me never visit again - you succeeded.

Dagon, your technological level is above average. Not all users i deal with are like this. For example, once in a while I get emails from people asking to cancel subscriptions that they started on different sites...

The last thing I want is for someone to put a link to a spoofed page that resembles my site and ask to re-enter username and password... At least this shows the lawyers that I have made a reasonable attempt to prevent such abuse. I'm sure you can see this point.

zzz

sandthipe;10946093 wrote:
you could check for strpos("the_link","your_domain"). check out the php manual at php.net for a quick and easy reference on strpos()

What if a post contains two links, one within my domain and one outside? Not sure how to handle that.

dagon

zzz;10946533 wrote:
I'm sure you can see this point.

frankly no, does amazon, google, or any one else, who would have looked at the legal issues inside and out, do it? well no.

zzz

Those guys have the money to defend themselves in court. This is a poor person's defense.

On the other hand Facebook and MySpace do...

😉

P.S. http://www.google.com/url?q=http://www.linkua.com&usd=1&usg=ALhdy2_eGQmrQoI_Imlyid7EjyrzfcMnzA

zzz

Well, this lively discussion resulted in no solutions so far...

So, going back to where I started. This function will convert text that looks like URl into links. If user enabled option to bypass alert the link will take them directly to the destination. I set that preference in cookie.

What I need now is to modify the second part. If the link is within my domain it should be a simple link but if it is to an external page, I need to send user to a warning page first.

// alert about external link
function url2link($extUrlStr) {
    // if cookie set -- bypass alert screen and take directly to the external page
    if ($_COOKIE['externalLink'] == $_SESSION['member_id']) {
        $setUrl = preg_replace("/(http:\/\/|(www\.))(([^\s<]{4,68})[^\s<]*)/", '<a href="http://$2$3" rel="nofollow" target="_blank">$2$4</a>', $extUrlStr);
    } else {
         // here I need to be able to detect whether a link is internal or external
		 // There might be multiple links in the text... need some sort of loop mechanism.
		 // STUCK!!!

      if ($myLink == 'internal') {
		$setUrl = preg_replace("/(http:\/\/|(www\.))(([^\s<]{4,68})[^\s<]*)/", '<a href="http://$2$3" rel="nofollow" target="_blank">$2$4</a>', $extUrlStr);
      } else {
	  	$setUrl = preg_replace("/(http:\/\/|(www\.))(([^\s<]{4,68})[^\s<]*)/", '<a href="/link/$2$3" rel="nofollow">$2$4</a>', $extUrlStr);
	  }        

}
return $setUrl;
}
}