why is this not working? (looping thru a form)

rdrnnr

hello

I'm trying to loop through the checkboxes in a form from within a function. When I explicity request a certain value, it works. but then a few lines later I try to loop through, it is not finding anything. any ideas?

Thanks!

Here's the code

function admin_edit_event_html(){
GLOBAL $html, $config, $HTTP_GET_VARS, $HTTP_POST_VARS, $conn;
//////////// irrelevant code removed
if ($HTTP_POST_VARS["actiontype"] == "update_event"){
// these work, they get the values from the form
$m_event->set_event($HTTP_POST_VARS["event_name"]);
$m_event->set_date($HTTP_POST_VARS["event_bc"] . $HTTP_POST_VARS["event_date"]);
$m_event->set_overview($HTTP_POST_VARS["event_overview"]);
$m_event->clear_timeline_id();

// Here is where it's not finding anything		
	while (list($key, $val) = each($HTTP_POST_VARS)){
		if(substr($key, 0, 11) == "tl_checkbox"){
			$m_id = str_replace("tl_checkbox_", "", $key);
			if(is_numeric($m_id)){
				$m_event->set_timeline_id($m_id);
			}
		}
	}
}
////////////  irrelevant code removed

}

planetsim

Well if its not showing all the checkboxes it could be a memory issue

rdrnnr

that's not it because if i take the code out of the function it works fine. im wondering if there is some scope issues going on, but that doesnt make sense either because the specifically-named form items are coming up fine within the function.

any ideas?

jnuneznyc

Could you print out $HTTP_POST_VARS using print_r() and then post it?

If you were to do the while loop first and then the other assignments... do the values for the checkbox work?

Finally this looks wrong...

if(substr($key, 0, 11) == "tl_checkbox"){

"tl_checkbox" is missing the underscore.

barand

If you name your checkboxes as an array, it makes it really easy to loop round them. Here's a sample script to explain.

<?php
if (isset($box)) foreach($box as $v) {
	echo "Box $v is checked <br>";
	}
?>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<title>Test check boxes</title>
</head>
<body>
<FORM ACTION="<?=$PHP_SELF?>" METHOD="get">
	<input type="checkbox" name="box[]" value="123"> Select 123<br>
	<input type="checkbox" name="box[]" value="124"> Select 124<br>
	<input type="checkbox" name="box[]" value="125"> Select 125<br>

<INPUT TYPE="submit" value="go"> 
</FORM> 
</body>
</html>

hth

rdrnnr

First, thanks to all for reading and replying, I'm trying to solve this and I appreciate your help.

jnuneznyc:

Here's what print_r() says about the form. Interestingly, it DOES see the checkbox:

Array ( [tool] => edit_event [actiontype] => update_event [event_id] => 62 [event_name] => Sparta defeats Athens [event_date] => 419 [event_bc] => - [event_overview] => blah blah [tl_checkbox_11] => on )

I tried playing around with the ordering etc and it's still not finding the checkboxes

barand:
any reason why you made the form a GET instead of POST?

I've used this looping technique before and it's worked, so I want to figure out why it's not working now.

rdrnnr

barand

any reason why you made the form a GET instead of POST?

Just so you could see what was being sent in the URL