Pie chart are slightly differents than classical line / curve / plot chart. First of all they can only accept one serie of data ( Serie1 in this example ). You can also specify in another serie the label associated to each points ( Serie2 in this example ). In this example we're manually feeding the series using the AddPoint() method of the pData class. Then we're associating Serie2 as the Abscise serie using the SetAbsciseLabelSerie() function. We're then calling the drawPieGraph() and drawPieLegend() functions to draw the graph. Running this script will create a example10.png file in the current directory.

 <?php
  // Standard inclusions   
  include("pChart/pData.class");
  include("pChart/pChart.class");

  // Dataset definition 
  $DataSet = new pData;
  $DataSet->AddPoint(array(10,2,3,5,3),"Serie1");
  $DataSet->AddPoint(array("Jan","Feb","Mar","Apr","May"),"Serie2");
  $DataSet->AddAllSeries();
  $DataSet->SetAbsciseLabelSerie("Serie2");

  // Initialise the graph
  $Test = new pChart(380,200);
  $Test->drawFilledRoundedRectangle(7,7,373,193,5,240,240,240);
  $Test->drawRoundedRectangle(5,5,375,195,5,230,230,230);

  // Draw the pie chart
  $Test->setFontProperties("Fonts/tahoma.ttf",8);
  $Test->drawPieGraph($DataSet->GetData(),$DataSet->GetDataDescription(),150,90,110,PIE_PERCENTAGE,TRUE,50,20,5);
  $Test->drawPieLegend(310,15,$DataSet->GetData(),$DataSet->GetDataDescription(),250,250,250);

  $Test->Render("example10.png");
 ?>
 

If you want to send the picture directly in a browser, replace the Render() command by Stroke().

Last updated on 05/16/2008