PHP 3.0.18 Predefined Variables Blank newbie

[matrixtech]

Hello,

I am a newbie to PHP. I am trying to write a script to find verify what page a user just came from. I am not sure which function to use $_Server or HttpServerVars. I have tried both passing them all the variables that you see from running a phpinfo program. They all show up blank. I dont get any error messages though. I am writing my code like this

<?php
echo HTTP_SERVER_VARS['HTTP_REFERER'];
?>

That code would show up blank. PS I am using earthlinks server which is why I am using that version of PHP.

Any ideas would be appreciated. Does it have to do with global variables? Also, does capitalization matter with predefined variables? Could I write http_server_vars['http_referer']?


Thanks a bunch,

Geoff

 

[DRJ478]

In yout post you might just be missing the dollar sign:

<php
echo $HTTP_SERVER_VARS['HTTP_REFERER'];
?>
If that's it, you are all set.

$_SERVER is available for versions >=4.1.0 only.

 

[matrixtech]

Hi,

Thanks for the reply. I wish it was that easy. In the real code, I did not forget the $. Any other ideas?

Thanks,

Geoff

 

[DRJ478]

Two things I'd like to ask/try:

1. Do the values show when you use phpinfo() in your code?

2. HTTP_REFERER is of course only present if the page was referred i.e., it was accessed from another page through a link. If you just type in the scripts URL then the variable is empty as it was a direct request.

 

[sleipnir214]

There is an additional limit to HTTP_REFERER.

Many browsers have a setting where the use can turn off referer reporting to servers. If the browser does not provide the information, the value will not be available.

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