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problem with foreach

Posted on 2008-10-04
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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);
}

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Question by:dreamer81
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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 ?
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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?
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Accepted Solution

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ali_kayahan earned 250 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) ,
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LVL 1

Author Comment

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

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