[RESOLVED] GET not working

Jon12345

My page is as follows:

<? 
if (isset($_GET['myvariable'])) {
$value= $_GET['myvariable'];
} else {
$value="xxx";
}
header ("Location: http://www.mysite.com?var=$value"); 
?>

The page is accessed via a link on another site that looks like this:

mysite.com?myvariable=test

Tt not picking up myvariable when it redirects. Why is that?

Thanks,

Jon

benracer

Try...

<? 
if (!isset($_GET['myvariable'])) { 
$value= $_GET['myvariable']; 
} else { 
$value="xxx"; 
} 
header ("Location: http://www.mysite.com?var=$value"); 
?>

Jon12345

Err, I'm playing spot the difference but can't see any!

benracer

yours...
if (isset($_GET['myvariable'])) {

mine...
if (!isset($_GET['myvariable'])) {

tron00

I tested your code and it seems to be working

test.php?myvariable=test

test.php file

if (isset($_GET['var']))	{
	echo $_GET['var'];
	exit;
}

if (isset($_GET['myvariable'])) {
	$value= $_GET['myvariable'];
} else {
	$value="xxx";
}
header ("Location: test.php?var=$value");

Jon12345

Ahh gotcha! What does putting the ! infront of isset do?

benracer

Check out this, i asked the same thing not long ago - its hard to search for what does a ! do? 😛 ...

http://www.phpbuilder.com/board/showthread.php?t=10349425

Jon12345

I think I have narrowed down where the problem is. It is on the previous page! When I hover over the links, they are incorrect. The following code is at the top of the page. Should it be before the <head> html for it to work?

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html><!-- InstanceBegin template="/Templates/main.dwt.php" codeOutsideHTMLIsLocked="false" -->
<head>
<?
if (isset($_GET['myvariable'])) {
$value= $_GET['myvariable'];
} else {
$value= "xxx";
}
?>

<a href="http://www.mysite.com/index.php?var=<? echo $value; ?>

tron00

! translates to "not" so !isset means "is not set"

Jon12345

I had a feeling it meant "not". But I still have the problem. You posted at the same time as me so my reply is just before yours!

benracer

It could be placed anywhere in the page, if that is your link then the script should be...

<? 
if (isset($_GET['var'])) { 
$value= $_GET['var']; 
} else { 
$value= "xxx"; 
} 
?>

Jon12345

Sorted now. I had two damn ?? in there! lol