problems with passing variables

zero816

I'm having trouble passing variables from a URL

for example, when i type "http://localhost/test.php?id=something", I cannot read a value for "id" inside the PHP script.

if the PHP file is this:

it will tell me that:
Notice: Undefined variable: id in c:\inetpub\wwwroot\test.php on line 5

i know this is basic, but i can't get it to work!

domhal

Try slamming this in before your print line:

$id = $HTTP_GET_VARS["id"];

Hope it helps!

Domhal

PS if this works, then you'll need this at the start of your scripts for every variable passed to the script. If its from a form using POST, then replace HTTP_GET_VARS with HTTP_POST_VARS

Also, remember to replace id with the name of the passed variable!

Alternatively, change the value of register_globals in your php config file. This, however, is not reccomended!

If my solution fails, ignore the PostScript!

Simple 😃

tsinka

Hi,

to make things easy you can use the extract function to make all post and/or get variables globally available. The documentation has some useful comments on that.

http://de2.php.net/manual/de/function.extract.php

This will make you backwards compatible down to php 3.0.7

Here's one of the comments (by Steve):

destes (at) ix.netcom.com
13-May-2002 09:13

Extract provides an invaluable way to get around the possibility of the PHP directive register_globals being off or on. If you're used to register_globals being on, and you're worried that new PHP 4.2.0 implementations will mess up existing code (because it now defaults to off), try using this:

if (!empty($GET)) {
extract($GET);
} else if (!empty($HTTP_GET_VARS)) {
extract($HTTP_GET_VARS);
}

if (!empty($POST)) {
extract($POST);
} else if (!empty($HTTP_POST_VARS)) {
extract($HTTP_POST_VARS);
}

That's from PHPMyAdmin (to give proper credit), and the same thing would probably be useful elsewhere. Thanks,

Steve

zero816

thank you all...it really helped

zero816