This example shows how to create a simple bar graph containing two data series. Data are manualy set using the AddPoint() method of the pData class. The graph function called is drawBarGraph() without extended parameters. Running this script will create a example3.png file in the current directory.

Output :


Source code :

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

  // Dataset definition 
  $DataSet = new pData;
  $DataSet->AddPoint(array(1,4,-3,2,-3,3,2,1,0,7,4,-3,2,-3,3,5,1,0,7),"Serie1");
  $DataSet->AddPoint(array(0,3,-4,1,-2,2,1,0,-1,6,3,-4,1,-4,2,4,0,-1,6),"Serie2");
  $DataSet->AddAllSeries();
  $DataSet->SetAbsciseLabelSerie();
  $DataSet->SetSerieName("January","Serie1");
  $DataSet->SetSerieName("February","Serie2");

  // Initialise the graph
  $Test = new pChart(700,230);
  $Test->setFontProperties("Fonts/tahoma.ttf",8);
  $Test->setGraphArea(50,30,585,200);
  $Test->drawFilledRoundedRectangle(7,7,693,223,5,240,240,240);
  $Test->drawRoundedRectangle(5,5,695,225,5,230,230,230);
  $Test->drawGraphArea(255,255,255,TRUE);
  $Test->drawScale($DataSet->GetData(),$DataSet->GetDataDescription(),SCALE_NORMAL,150,150,150,TRUE,0,2);   
  $Test->drawGrid(4,TRUE,230,230,230,50);

  // Draw the 0 line
  $Test->setFontProperties("Fonts/tahoma.ttf",6);
  $Test->drawTreshold(0,143,55,72,TRUE,TRUE);

  // Draw the bar graph
  $Test->drawOverlayBarGraph($DataSet->GetData(),$DataSet->GetDataDescription());

  // Finish the graph
  $Test->setFontProperties("Fonts/tahoma.ttf",8);
  $Test->drawLegend(600,30,$DataSet->GetDataDescription(),255,255,255);
  $Test->setFontProperties("Fonts/tahoma.ttf",10);
  $Test->drawTitle(50,22,"Example 3",50,50,50,585);
  $Test->Render("example3.png");
 ?>
 

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