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Bug #30019 $_SERVER['HTTP_REFERER']; doesn't always display
Submitted: 2004-09-08 00:27 UTC Modified: 2004-09-09 20:22 UTC
From: asfsm at uaa dot alaska dot edu Assigned:
Status: Not a bug Package: *General Issues
PHP Version: 5.0.1 OS: Windows 2003 (standard)
Private report: No CVE-ID: None
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 [2004-09-08 00:27 UTC] asfsm at uaa dot alaska dot edu 
Description:
------------
$_SERVER['HTTP_REFERER']; doesn't always display

It displays occassionally, but not all the time.

Reproduce code:
---------------
<?php
$send_ip = $_SERVER['REMOTE_ADDR']; 
$send_agent = $_SERVER['HTTP_USER_AGENT'];
$send_refer = $_SERVER['HTTP_REFERER'];
?>

<table border="0">
<tr>
 <td><?php echo $send_ip; ?></td>
</tr>
<tr>
 <td><?php echo $send_agent; ?></td>
</tr>
<tr>
 <td><?php echo $send_refer; ?></td>
</tr>
</table>

Expected result:
----------------
<browser's_IP address>
<referring page>
<browser type>

Actual result:
--------------
<browser's_IP address>

<browser type>

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 [2004-09-08 06:04 UTC] rasmus@php.net 
Because clients don't always send the referrer.  No bug here.  PHP will have it if the client provides it, otherwise it won't.
 [2004-09-08 20:59 UTC] asfsm at uaa dot alaska dot edu 
Even if the cache is cleared and the page is reloaded?  this is a browser issue?
 [2004-09-09 09:01 UTC] rasmus@php.net 
Especially if the cache is cleared and the page reloaded.  Do you understand what the referrer actually means?  It is the URL that a user clicked on a link to get to your page.  If the user simply types in the url or does a reload, there will be no referrer in the request.  This isn't a browser "issue", this is simply how the Web works.
 [2004-09-09 20:22 UTC] asfsm at uaa dot alaska dot edu 
Yes I understand how the web works, but I don't obviously know everything. Your explanation of referer makes sense though.
 
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