This example shows various graphing techniques playing with line graph style using the setLineStyle fonction. The X scale is also stretched showing only one label every 3 points using the last parameter of the drawScale function. We're also including the external picture Sample/logo.png calling the drawFromPNG function with a default alpha transparency of 0.

This code can looks a bit tricky because using various exotic functionalities but is also more representative of what you'll probably do to customize a bit your charts!

Output :


Source code :

 <?php
  // Standard inclusions      
  include("pChart/pData.class");   
  include("pChart/pChart.class");   
  
  // Dataset definition    
  $DataSet = new pData;
  $DataSet->AddPoint(array(10,9.4,7.7,5,1.7,-1.7,-5,-7.7,-9.4,-10,-9.4,-7.7,-5,-1.8,1.7),"Serie1");
  $DataSet->AddPoint(array(0,3.4,6.4,8.7,9.8,9.8,8.7,6.4,3.4,0,-3.4,-6.4,-8.6,-9.8,-9.9),"Serie2");
  $DataSet->AddPoint(array(7.1,9.1,10,9.7,8.2,5.7,2.6,-0.9,-4.2,-7.1,-9.1,-10,-9.7,-8.2,-5.8),"Serie3");
  $DataSet->AddPoint(array("Jan","Jan","Jan","Feb","Feb","Feb","Mar","Mar","Mar","Apr","Apr","Apr","May","May","May"),"Serie4");
  $DataSet->AddAllSeries();
  $DataSet->SetAbsciseLabelSerie("Serie4");
  $DataSet->SetSerieName("Max Average","Serie1");
  $DataSet->SetSerieName("Min Average","Serie2");
  $DataSet->SetSerieName("Temperature","Serie3");
  $DataSet->SetYAxisName("Temperature");
  $DataSet->SetXAxisName("Month of the year");
  
  // Initialise the graph   
  $Test = new pChart(700,230);
  $Test->reportWarnings("GD");
  $Test->setFixedScale(-12,12);
  $Test->setFontProperties("Fonts/tahoma.ttf",8);   
  $Test->setGraphArea(65,30,570,185);   
  $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,TRUE,3);   
  $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 area
  $DataSet->RemoveSerie("Serie4");
  $Test->drawArea($DataSet->GetData(),"Serie1","Serie2",239,238,227,50);
  $DataSet->RemoveSerie("Serie3");
  $Test->drawLineGraph($DataSet->GetData(),$DataSet->GetDataDescription());   

  // Draw the line graph
  $Test->setLineStyle(1,6);
  $DataSet->RemoveAllSeries();
  $DataSet->AddSerie("Serie3");
  $Test->drawLineGraph($DataSet->GetData(),$DataSet->GetDataDescription());   
  $Test->drawPlotGraph($DataSet->GetData(),$DataSet->GetDataDescription(),3,2,255,255,255);   

  // Write values on Serie1 & Serie2
  $Test->setFontProperties("Fonts/tahoma.ttf",8);   
  $Test->writeValues($DataSet->GetData(),$DataSet->GetDataDescription(),"Serie3");   
  
  // Finish the graph   
  $Test->setFontProperties("Fonts/tahoma.ttf",8);   
  $Test->drawLegend(590,90,$DataSet->GetDataDescription(),255,255,255);   
  $Test->setFontProperties("Fonts/tahoma.ttf",10);   
  $Test->drawTitle(60,22,"example 15",50,50,50,585);

  // Add an image
  $Test->drawFromPNG("Sample/logo.png",584,35);

  // Render the chart
  $Test->Render("example15.png");      
 ?>
 

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