Referer

[mycro]

I want to make it so if someone enters from any page in my site, then echo You were referred, otherwise, echo you were not.

How would i setup a wildcard, to make it so it will echo "You were referred from inside this site" if the user was referred from any page on mysite.com, not just like mysite.com/the.php? Thanks

<?php 
 if($_SERVER['HTTP_REFERER'] == "http://www.mysite.com/") {
 echo('You were referred from inside this site'); 
   }
 else {
 echo ('You were referred from outside this site.');
 }
?>

[Weedpacket]

Use [man]parse_url[/man] and look at the host; or [man]substr[/man] and look at the initial part of the http_referer; or [man]strpos[/man] to see if the desired string is in there; or use [man]preg_match[/man] and a regular expression that matches the host name; or...

[mycro]

Hmm I put that in and it doesn't seem to be working. I have an else statement in there, and even when it is referred from my site, it echos the else statement... Any ideas?

[Weedpacket]

Well, what I actually had in mind was looking to see if the hostname was inside $_SERVER['HTTP_REFERER']:

$referer_bits = parse_url($_SERVER['HTTP_REFERER']);
if($referer_bits['host']=='www.mysite.com')
{// is there
}

if(substr($_SERVER['HTTP_REFERER'], 0, strlen("http://www.mysite.com/"))=="http://www.mysite.com/")
{// is there
}

if(strpos($_SERVER['HTTP_REFERER'],'www.mysite.com/'))
{ // is there
}

if(preg_match('#^{http://www.mysite.com/#',} $_SERVER['HTTP_REFERER']))
{ // is there
}

If you want to change any of these to their opposite (so that the bit in {} is executed if the referring host was not www.mysite.com), then replace == with != or (if there is no == to replace), put a ! at the beginning of the test (so that where it says "if(" now, make it say "if(!".

I prefer one of the first two to either of the last two. The first two both have good points and bad points; the strpos() solution has a nasty kludge built into it that I'm not keen on; and I simply can't justify calling on the firepower inherent in preg_match() for such a straightforward task.

[mycro]

I'm pretty sure it was working, but my problem is this. With the code you gave me it needs there to be 'www' in the url. How do I make it so it will work when there is no www, just mysite.com? I tried adding another if statement with 'www.mysite.com' but it doesn't seem to be working. (I used the first one by the way) Thanks

[mycro]

I think I got it, how does this look? (Just want to make sure its error-free)

<?
$referer_bits = parse_url($_SERVER['HTTP_REFERER']); 
if(($referer_bits['host'] != 'mysite.com') && ($referer_bits['host'] != 'www.mysite.com')) { 
echo ('<font color=#FF0000 size=3>You were referred from another site. Please return to our <b>Main Page</b></font>');
}
?>

[Weedpacket]

Yep: I like it - works for me!