It can be usefull to add small graphs on web pages tracking pages views or visitors per hour. You can use pChart to draw minimal pieces of charts. In this example Data are manualy set using the AddPoint() method of the pData class. The graph function called is drawLineGraph(). Running this script will create a SmallGraph.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(1,4,-3,2,-3,3,2,1,0,7,4,-3,2,-3,3,5,1,0,7),"Serie1");
 $DataSet->AddAllSeries();
 $DataSet->SetAbsciseLabelSerie();
 $DataSet->SetSerieName("January","Serie1");

 // Initialise the graph
 $Test = new pChart(100,30);
 $Test->setFontProperties("Fonts/tahoma.ttf",8);
 $Test->drawFilledRoundedRectangle(2,2,98,28,2,230,230,230);
 $Test->setGraphArea(5,5,95,25);
 $Test->drawGraphArea(255,255,255);
  $Test->drawScale($DataSet->GetData(),$DataSet->GetDataDescription(),SCALE_NORMAL,150,150,150,TRUE,0,2);   

 // Draw the line graph
 $Test->drawLineGraph($DataSet->GetData(),$DataSet->GetDataDescription());

 // Finish the graph
 $Test->Render("SmallGraph.png");
 ?>
 

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

Last updated on 05/16/2008