Is this correct?

NYSiRacer

Hi, I'm a newbie, so forgive me...
I'm using getenv("HTTP_REFERER") to log referers, and if $referer doesn't come from mydomain.com, then php should log it, else do nothing. Please tell me if the following is correct:

$referer = getenv("HTTP_REFERER");
if ((!preg_match("/^http:\\/\\/mydomain.com/i",$referer)) || (!preg_match("/^http:\\/\\/www.mydomain.com/i",$referer))) {
// log referer
}

Thanks.

br__ken

escape the . and it should work: . = any char, . = literal .

br__ken

oh btw, you can shorten it to just this:

if(!preg_match("/^http:\\/\\/(w{3}\\.)?mydomain\\.com/i",$ref2))
{
 //log it
}

// or even
if(!preg_match("/^http:\\/\\/(www\\.)?mydomain\\.com/i",$ref))
// both do the same thing

that matches:
http://mydomain.com
and
http://www.mydomain.com

[sidenote:]
i hate when the forum makes me double escape shit
[othersidenote:]
what do u race? 😃

NYSiRacer

Um... I don't understand why you added the parenthesis and the question mark, would you care to explain?

Thanks.

2000 EBPsi

NYSiRacer

Anybody..... please?

br__ken

preg_match("/^{http:\/\/(w{3}.)?mydomain.com/i",$ref2}

broken down:

match->

(starts with) [url]http://[/url]

(w{3}.)?

this matches a set , same as (www.)
the ? makes the set optional.. so what we have so far matches
either

[url]http://[/url]

or
http://www.

make a little more sense?

oh the w{3} just means match w{3 of them} its setup like

matchthis{min,max} so its:

a{1} matches "a"
a{2} matches "aa"
a{2,3} matches "aa" or "aaa"
so on and so on: heres more on the syntax
http://www.php.net/manual/en/pcre.pattern.syntax.php

br__ken

on a further note: this would match all 4 of these:

$ref="http://mydomain.com";
$ref2="http://www.mydomain.com";

$ref3="ftp://mydomain.com";
$ref4="ftp://www.mydomain.com";

if(!preg_match("/^(http|ftp):\\/{2}(w{3}\\.)?mydomain\\.com/i",$ref4))
	echo "log it";

NYSiRacer

I understand it now, thank you very much.