Want to win a PS4? Go Premium and enter to win our High-Tech Treats giveaway. Enter to Win

x
?
Solved

problem with foreach

Posted on 2008-10-04
4
Medium Priority
?
293 Views
Last Modified: 2008-10-04
I want to loop over an array in a foreach. Inside the forreach I am creating som plots for a JPGraph.

It loops fine, but the problem is that it overwrites the data for each loop. How do I avoid this? Variable variable names?
foreach ($sensorArray as $sensor) {	
	$data = $db->getDataSet($sensor, $hoursback);
	$alias = $db->getSensorName($sensor);
	$xdata = array_keys($data);
	$ydata = array_values($data);
	$line2 = new LinePlot($ydata, $xdata);
	$line2->SetLegend($alias);
	$line2->SetColor('#0000FF');
	$line2->mark->SetWidth(4);
	$graph->Add($line2);
}

Open in new window

0
Comment
Question by:dreamer81
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
4 Comments
 
LVL 14

Expert Comment

by:Ali Kayahan
ID: 22640212
Why dont you use arrays ? ;
foreach ($sensorArray as $sensor) {      
      $data[] = $db->getDataSet($sensor, $hoursback);
      $alias[] = $db->getSensorName($sensor);
      $xdata[] = array_keys($data);
      $ydata[] = array_values($data);
      $line2[] = new LinePlot($ydata, $xdata);
      $line2->SetLegend($alias);
      $line2->SetColor('#0000FF');
      $line2->mark->SetWidth(4);
      $graph->Add($line2);
}
   If this is not what you are looking for , than can you please explain in a detailed way ?
0
 
LVL 1

Author Comment

by:dreamer81
ID: 22640544
when I called $graph->Add($line2); the first time in the loop it adds the first graph

when it is called the next time in the loop $line2 reference is overwritten, you know?
0
 
LVL 14

Accepted Solution

by:
Ali Kayahan earned 750 total points
ID: 22640633
  I am not so clear with the issue , but clearstatcache() or unset($line2) commands inside loop may solve your issue,
 
   it seems that youare trying to get new values each time run the for each from other objects , but foreach will only iterate the related array (sensorArray this time and $sensor 's value will change) ,
0
 
LVL 1

Author Comment

by:dreamer81
ID: 22641159
unset($line2) did the job...

0

Featured Post

What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Part of the Global Positioning System A geocode (https://developers.google.com/maps/documentation/geocoding/) is the major subset of a GPS coordinate (http://en.wikipedia.org/wiki/Global_Positioning_System), the other parts being the altitude and t…
These days socially coordinated efforts have turned into a critical requirement for enterprises.
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions. Consider email address RFCs: Look at HTML5 form input element (with type=email) regex pattern: T…
The viewer will learn how to dynamically set the form action using jQuery.
Suggested Courses

636 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question