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$_SERVER['HTTP_HOST'] as a variable

Posted: Wed Jan 05, 2011 12:04 pm
by JackTheKnife
What is different between:

$host = $_SERVER['HTTP_HOST'];

and

$host = "www.my-domain.com";

Somehow when I have to use first line then $_SESSION vars doesn't go through two different domains.

Re: $_SERVER['HTTP_HOST'] as a variable

Posted: Wed Jan 05, 2011 12:07 pm
by Jade
You need to read this page in the php manual: http://www.php.net/manual/en/reserved.v ... server.php

Re: $_SERVER['HTTP_HOST'] as a variable

Posted: Wed Jan 05, 2011 12:12 pm
by JackTheKnife
I know what $_SERVER['HTTP_HOST'] stands for, but why is not working properly when I have declared $host variable as $_SERVER['HTTP_HOST'] but it works when I have "hard coded"?

Once again, because looks like ppl are confused what I am asking about.

I have piece of code:

Code: Select all

//$host  = $_SERVER['HTTP_HOST']; //disabeld for testing

$host = "www.my-domain.com"; //dummy domain for testing 

$sql = "SELECT * FROM Items WHERE  LandingPageURL = '".$host."'";
               .......
$landingpage = $row["LandingPage"];
               ...........	

if ($landingpage==$host){
$_SESSION["pid"] = $product['id'];
$_SESSION["price"] = $product['price'];
               ...........

}

else {

echo "oops... wrong page";
}

Then I do POST form to the another site (domain) on this same server but all $_SESSION vars are empty when I have use $host = $_SERVER['HTTP_HOST'] instead of $host = "www.my-domain.com";

Re: $_SERVER['HTTP_HOST'] as a variable

Posted: Wed Jan 05, 2011 2:00 pm
by Jade
Sessions are unique to each domain. So if you're on abc.com and you have a session, then go to def.com the session information you had for abc.com is no longer available.