This example shows how to create a simple line graph containing 3 data series. The graph function called is drawLineGraph() without extended parameters. A plot graph is superposed over the line layer using the drawPlotGraph() function. Running this script will create a example1.png file in the current directory.

Output :

Note on the dataset

Data are retrieved from a CSV file named bulkdata.csv. This file contains 4 colums : Column 0 is used as index, Column 1-2-3 are used as data series. This file does not contains header, Series name are set manualy using the SetSerieName command.

Click here to download bulkdata.csv
Source code :

 <?php
  // Standard inclusions      
  include("pChart/pData.class");   
  include("pChart/pChart.class");   
  
  // Dataset definition    
  $DataSet = new pData;   
  $DataSet->ImportFromCSV("Sample/bulkdata.csv",",",array(1,2,3),FALSE,0);   
  $DataSet->AddAllSeries();   
  $DataSet->SetAbsciseLabelSerie();   
  $DataSet->SetSerieName("January","Serie1");   
  $DataSet->SetSerieName("February","Serie2");   
  $DataSet->SetSerieName("March","Serie3");   
  $DataSet->SetYAxisName("Average age");
  $DataSet->SetYAxisUnit("µs");
  
  // Initialise the graph   
  $Test = new pChart(700,230);   
  $Test->setFontProperties("Fonts/tahoma.ttf",8);   
  $Test->setGraphArea(70,30,680,200);   
  $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 line graph
  $Test->drawLineGraph($DataSet->GetData(),$DataSet->GetDataDescription());   
  $Test->drawPlotGraph($DataSet->GetData(),$DataSet->GetDataDescription(),3,2,255,255,255);   
  
  // Finish the graph   
  $Test->setFontProperties("Fonts/tahoma.ttf",8);   
  $Test->drawLegend(75,35,$DataSet->GetDataDescription(),255,255,255);   
  $Test->setFontProperties("Fonts/tahoma.ttf",10);   
  $Test->drawTitle(60,22,"example 1",50,50,50,585);   
  $Test->Render("example1.png");      
 ?>
 

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