This example creating a stacked area chart with 3D effects. The followings are key features of this example:

• Add a stacked area layer using XYChart.addAreaLayer2 with the Stack pre- defined constant.
  
  
• Add multiple data sets to the area layer using Layer.addDataSet.
  
  
• Add a legend to the chart using BaseChart.addLegend
  
  
• Add a title to the y-axis using Axis.setTitle, and draw the title upright (instead of rotated 90 degrees) using TextBox.setFontAngle. Note that the title can contain multiple lines using line break characters.

[File: phpdemo/threedstackarea.php".]

<?php require_once("../lib/phpchartdir.php"); #The data for the area chart $data0 = array(42, 49, 33, 38, 51, 46, 29, 41, 44, 57, 59, 52, 37, 34, 51, 56, 56, 60, 70, 76, 63, 67, 75, 64, 51); $data1 = array(50, 45, 47, 34, 42, 49, 63, 62, 73, 59, 56, 50, 64, 60, 67, 67, 58, 59, 73, 77, 84, 82, 80, 84, 89); $data2 = array(61, 79, 85, 66, 53, 39, 24, 21, 37, 56, 37, 22, 21, 33, 13, 17, 4, 23, 16, 25, 9, 10, 5, 7, 16); $labels = array("0", "-", "2", "-", "4", "-", "6", "-", "8", "-", "10", "-", "12", "-", "14", "-", "16", "-", "18", "-", "20", "-", "22", "-", "24"); #Create a XYChart object of size 500 x 300 pixels $c = new XYChart(500, 300); #Set the plotarea at (90, 30) and of size 300 x 240 pixels. $c->setPlotArea(90, 30, 300, 240); #Add a legend box at (405, 100) $c->addLegend(405, 100); #Add a title to the chart $c->addTitle("Daily System Load"); #Add a title to the y axis. Draw the title upright (font angle = 0) $titleObj = $c->yAxis->setTitle("Database\nQueries\n(per sec)"); $titleObj->setFontAngle(0); #Set the labels on the x axis $c->xAxis->setLabels($labels); #Add an area layer $layer = $c->addAreaLayer(); #Draw the area layer in 3D $layer->set3D(); #Add the three data sets to the area layer $layer->addDataSet($data0, -1, "Server # 1"); $layer->addDataSet($data1, -1, "Server # 2"); $layer->addDataSet($data2, -1, "Server # 3"); #output the chart header("Content-type: image/png"); print($c->makeChart2(PNG)); ?>