Referrer Block

Is it possible to block a refferer using PHP?
Don't tell me to do it by .htaccess .. I wanna know if it's possible via PHP.

 

Yes. Use the var
$_SERVER['HTTP_REFERER']
to match against it

 

Suppose I want to show a text to visitor that came from unblocked refferer or came without referrer and don't wanna show it to visitor came for blocked refferer.If I use following code..

<?php
$ref=@$HTTP_REFERER;
$blank = "";
$blockedref = "http://www.badhost.com/";
if($ref != $blank && $ref != $blockedref)
echo "Text to show to unblocked refferer";
else
die();
?>

PHP:

It will only blocked the specific URL I defined in $blockedref .. If a visitor come from http://www.badhost.com/dir/page.php .. It will not block that.
How can I block the entire URL ..

 

Use the dirname() function on the url string.

 

$blockedref = "badhost.com";
$ref = @$_SERVER['HTTP_REFERER'];
if( $ref && strpos( $ref, $blockedref ) !== false )
  die();

PHP:

=;-)