Using $GET to load sections.

[spookztar]

Hi guys,

 

I'm having a problem with $_GET coming up empty. I tried searching, but couldn't get to anything with the criteria I used.

 

I have a menu:

<a href="<?php echo $_SERVER['PHP_SELF'] ?>?sectionid=1">Product Handling</a><br />

<a href="<?php echo $_SERVER['PHP_SELF'] ?>?sectionid=2">Misc. Parameters</a><br />

<a href="<?php echo $_SERVER['PHP_SELF'] ?>?sectionid=3">Statistics</a><br />

<a href="<?php echo $_SERVER['PHP_SELF'] ?>?sectionid=4">Look 'n' Feel</a>

 

- and when a link is clicked I want the appropriate section of the index.php file to display to the user only using the one file. But when I try to pick up the value with: $sectionid = $_GET['sectionid']; I just get:

 

Notice: Undefined index: sectionid in /home/arioch/public_html/musiccenter.php on line 195

 

What do I need to do pick up the variable in the URL, so I can use it to load the correct section of the file to the user, using only the one page?

 

Bye,

[Dragen]

check that you're setting $sectionid before you're calling it.

[corbin]

It looks to me like your error reporting is set very, very strictly....

 

Try doing:

 

$sectionid = (isset($_GET['sectionid']) && is_numeric($_GET['sectionid'])) ? $_GET['sectionid'] : 1;

 

isset doesn't flag an error if you try to check a non existant variable (or key) with it.  This will just check if it's set and numeric, and if it is, it will assign it to $sectionid, but if it's empty, it'll assign the default value of 1 to it.

[spookztar]

It must be empty then, because when echoed, it produces "1" and the other links, nothing at all.

 

And yes, error reporting is strict. I'm a newbie and need to know when something potentially bad is up.

[Dragen]

are you sure $sectionid is being set before you're calling it?

and that the spelling (CAPS/no caps etc) is correct?

[cooldude832]

you missing the semi colon on the end of the echos

[Dragen]

yeah I saw that too, but didn't think it'd matter on just echoing one variable.. In fact I'm sure I've echoed variables like that before no problem...

I may be wrong though

[cooldude832]

no it does matter semicolons are used for the compiling purposes.  It is what tells the complier hey this is the end of this echo or the end of a variable otherwise what it is doing is its using the question marks as a crude if statement i think or classes, just use proper punctuation

[cooldude832]

try this

<?php
$links[1] = "Product Handling";
$links[2] =  "Misc. Paramenters";
$links[3] = "Statistics";
$links[4] = "Look \'n\' Feel";
foreach ($links as $key => $value){
echo "<a href=\"".$_SERVER['self']."?sectionid=".$key."\">".$value."</a>";
}
?>
//Page 2
<?php
if(ISSET($_GET['sectionid'])){$pageid = $_GET['sectionid'];}

?>

then you can add more by appending this array

[spookztar]

"are you sure $sectionid is being set before you're calling it?"

 

Isn't that the whole point of: sectionid = $_GET['sectionid'];? I'm not in doubt as to whether it's set or not, but why it isn't.

 

I included the semicolons, didn't do a thing. Strict error reporting obviously didn't care either...

[cooldude832]

what's your php version I doubt you on 3, but if you are its $_HTTP_GET i believe

[spookztar]

Thanx for your suggestion cooldude832, but it just gave me "undefined index..." on all four.

[spookztar]

The version is: PHP Version 4.4.6-2+b1

[cooldude832]

??? that makes no sense at all

[corbin]

When set very strictly, the PHP error handling will flag warnings when you try to use not-set variables....

 

<?php

$link = array();
$links[] = "Product Handling";
$links[] =  "Misc. Paramenters";
$links[] = "Statistics";
$links[] = "Look \'n\' Feel";
foreach ($links as $key => $value){
echo "<a href=\"page2.php?sectionid=".$key."\">".$value."</a>";
}
?>

 

Then page2:

 

<?php
$sectionid = (isset($_GET['sectionid'])) ? $_GET['sectionid'] : 0;
echo $sectionid;
?>

[spookztar]

That works Corbin, but why can't I grab/set the "$sectionid" from the URL and use it to load the proper section of the file when returning to the file itself through the use of PHP_SELF? ???

 

It just seems so basic...

[spookztar]

No suggestions as to how I can accomplish the desired result - or at least why I can't use $_GET with PHP_SELF? Could it have something to do with the preceeding use of nested IF/ELSE'S to sanitize an verify log-in details?