This example demonstrates how to plot multiple data sets as multiple lines. ChartDirector allows each line to have different color, line width and dash styles.

This example also demonstrates how to set background colors and 3D borders for a chart, enable both vertical and horizontal grid lines, and add a legend box at the top of the chart.

• Set background color and 3D border for the chart using XYChart.XYChart.
  
  
• Enable both vertical and horizontal grid lines using XYChart.setPlotArea.
  
  
• Add a legend at the top of the chart using BaseChart.addLegend.
  
  
• Add an empty line layer using XYChart.addLineLayer2, then add multiple data sets to the line layer using Layer.addDataSet.
  
  
• Create a dash line color for a line using BaseChart.dashLineColor.
  
  
• Set the default line width for all lines in the layer using Layer.setLineWidth. (To set the line width for one particular line, use DataSet.setLineWidth.)

[File: phpdemo/multiline.php".]

<?php require_once("../lib/phpchartdir.php"); #The data for the line 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, 55, 47, 34, 42, 49, 63, 62, 73, 59, 56, 50, 64, 60, 67, 67, 58, 59, 73, 77, 84, 82, 80, 84, 98); $data2 = array(36, 28, 25, 33, 38, 20, 22, 30, 25, 33, 30, 24, 28, 15, 21, 26, 46, 42, 48, 45, 43, 52, 64, 60, 70); #The labels for the line chart $labels = array("0", "", "", "3", "", "", "6", "", "", "9", "", "", "12", "", "", "15", "", "", "18", "", "", "21", "", "", "24"); #Create a XYChart object of size 500 x 300 pixels, with a pale yellow (0xffff80) #background, a black border, and 1 pixel 3D border effect $c = new XYChart(500, 300, 0xffff80, 0x0, 1); #Set the plotarea at (55, 45) and of size 420 x 210 pixels, with white #background. Turn on both horizontal and vertical grid lines with light grey #color (0xc0c0c0) $c->setPlotArea(55, 45, 420, 210, 0xffffff, -1, -1, 0xc0c0c0, -1); #Add a legend box at (55, 25) (top of the chart) with horizontal layout. Use 8 #pts Arial font. Set the background and border color to Transparent. $legendObj = $c->addLegend(55, 25, false, "", 8); $legendObj->setBackground(Transparent); #Add a title box to the chart using 11 pts Arial Bold Italic font. The text is #white (0xffffff) on a dark red (0x800000) background, with a 1 pixel 3D border. $titleObj = $c->addTitle("Daily Server Load", "arialbi.ttf", 11, 0xffffff); $titleObj->setBackground(0x800000, -1, 1); #Add a title to the y axis $c->yAxis->setTitle("MBytes"); #Set the labels on the x axis $c->xAxis->setLabels($labels); #Add a title to the x axis $c->xAxis->setTitle("Jun 12, 2001"); #Add a line layer to the chart $layer = $c->addLineLayer2(); #Set the default line width to 2 pixels $layer->setLineWidth(2); #Add the three data sets to the line layer. For demo purpose, we use a dash line #color for the last line $layer->addDataSet($data0, -1, "Server # 1"); $layer->addDataSet($data1, -1, "Server # 2"); $layer->addDataSet($data2, $c->dashLineColor(0x3333ff, DashLine), "Server # 3"); #output the chart header("Content-type: image/png"); print($c->makeChart2(PNG)); ?>