PHP Stacked Area Charts & Graphs

Stacked Area Chart is formed by stacking multiple data-series, one on top of the other. The given example shows simple Stacked Area Chart along with PHP source code that you can try running locally.

<?php

$dataPoints1 = array(
	array("label"=> "2007", "y"=> 2016456 ),
	array("label"=> "2008", "y"=> 1985801 ),
	array("label"=> "2009", "y"=> 1755904 ),
	array("label"=> "2010", "y"=> 1847290 ),
	array("label"=> "2011", "y"=> 1733430 ),
	array("label"=> "2012", "y"=> 1514043 ),
	array("label"=> "2013", "y"=> 1581115 ),
	array("label"=> "2014", "y"=> 1581710 ),
	array("label"=> "2015", "y"=> 1352398 ),
	array("label"=> "2016", "y"=> 1239149 )
);

$dataPoints2 = array(
	array("label"=> "2007", "y"=> 49505 ),
	array("label"=> "2008", "y"=> 31917 ),
	array("label"=> "2009", "y"=> 25972 ),
	array("label"=> "2010", "y"=> 23337 ),
	array("label"=> "2011", "y"=> 16086 ),
	array("label"=> "2012", "y"=> 13403 ),
	array("label"=> "2013", "y"=> 13820 ),
	array("label"=> "2014", "y"=> 18276 ),
	array("label"=> "2015", "y"=> 17372 ),
	array("label"=> "2016", "y"=> 13008 )
);

$dataPoints3 = array(
	array("label"=> "2007", "y"=> 896590 ),
	array("label"=> "2008", "y"=> 882981 ),
	array("label"=> "2009", "y"=> 920979 ),
	array("label"=> "2010", "y"=> 987697 ),
	array("label"=> "2011", "y"=> 1013689 ),
	array("label"=> "2012", "y"=> 1225894 ),
	array("label"=> "2013", "y"=> 1124836 ),
	array("label"=> "2014", "y"=> 1126609 ),
	array("label"=> "2015", "y"=> 1333482 ),
	array("label"=> "2016", "y"=> 1378307 )
);

$dataPoints4 = array(
	array("label"=> "2007", "y"=> 806425 ),
	array("label"=> "2008", "y"=> 806208 ),
	array("label"=> "2009", "y"=> 798855 ),
	array("label"=> "2010", "y"=> 806968 ),
	array("label"=> "2011", "y"=> 790204 ),
	array("label"=> "2012", "y"=> 769331 ),
	array("label"=> "2013", "y"=> 789016 ),
	array("label"=> "2014", "y"=> 797166 ),
	array("label"=> "2015", "y"=> 797178 ),
	array("label"=> "2016", "y"=> 805694 )
);

$dataPoints5 = array(
	array("label"=> "2007", "y"=> 247510 ),
	array("label"=> "2008", "y"=> 254831 ),
	array("label"=> "2009", "y"=> 273445 ),
	array("label"=> "2010", "y"=> 260203 ),
	array("label"=> "2011", "y"=> 319355 ),
	array("label"=> "2012", "y"=> 276240 ),
	array("label"=> "2013", "y"=> 268565 ),
	array("label"=> "2014", "y"=> 259367 ),
	array("label"=> "2015", "y"=> 249080 ),
	array("label"=> "2016", "y"=> 267812 )
);

$dataPoints6 = array(
	array("label"=> "2007", "y"=> 612 ),
	array("label"=> "2008", "y"=> 864 ),
	array("label"=> "2009", "y"=> 891 ),
	array("label"=> "2010", "y"=> 1212 ),
	array("label"=> "2011", "y"=> 1818 ),
	array("label"=> "2012", "y"=> 4327 ),
	array("label"=> "2013", "y"=> 9036 ),
	array("label"=> "2014", "y"=> 17691 ),
	array("label"=> "2015", "y"=> 24893 ),
	array("label"=> "2016", "y"=> 36054 )
);

?>
<!DOCTYPE HTML>
<html>
<head>  
<script>
window.onload = function () {

var chart = new CanvasJS.Chart("chartContainer", { 
	theme: "light2",
	title: {
		text: "Generation of Electricity in US - 2007 to 2016"
	},
	subtitles: [{
		text: "In Gigawatt Hours"
	}],
	axisY: {
		includeZero: false
	},
	legend:{
		cursor: "pointer",
		itemclick: toggleDataSeries
	},
	toolTip: {
		shared: true
	},
	data: [{
		type: "stackedArea",
		name: "Coal",
		showInLegend: true,
		visible: false,
		yValueFormatString: "#,##0 GWh",
		dataPoints: <?php echo json_encode($dataPoints1, JSON_NUMERIC_CHECK); ?>
	},
	{
		type: "stackedArea",
		name: "Petroleum",
		showInLegend: true,
		yValueFormatString: "#,##0 GWh",
		dataPoints: <?php echo json_encode($dataPoints2, JSON_NUMERIC_CHECK); ?>
	},
	{
		type: "stackedArea",
		name: "Natual Gas",
		showInLegend: true,
		visible: false,
		yValueFormatString: "#,##0 GWh",
		dataPoints: <?php echo json_encode($dataPoints3, JSON_NUMERIC_CHECK); ?>
	},
	{
		type: "stackedArea",
		name: "Nuclear",
		showInLegend: true,
		visible: false,
		yValueFormatString: "#,##0 GWh",
		dataPoints: <?php echo json_encode($dataPoints4, JSON_NUMERIC_CHECK); ?>
	},
	{
		type: "stackedArea",
		name: "Hydroelectric",
		showInLegend: true,
		visible: false,
		yValueFormatString: "#,##0 GWh",
		dataPoints: <?php echo json_encode($dataPoints5, JSON_NUMERIC_CHECK); ?>
	},
	{
		type: "stackedArea",
		name: "Solar",
		showInLegend: true,
		yValueFormatString: "#,##0 GWh",
		dataPoints: <?php echo json_encode($dataPoints6, JSON_NUMERIC_CHECK); ?>
	}]
});

chart.render();

function toggleDataSeries(e){
	if (typeof(e.dataSeries.visible) === "undefined" || e.dataSeries.visible) {
		e.dataSeries.visible = false;
	}
	else{
		e.dataSeries.visible = true;
	}
	chart.render();
}

}
</script>
</head>
<body>
<div id="chartContainer" style="height: 370px; width: 100%;"></div>
<script src="https://canvasjs.com/assets/script/canvasjs.min.js"></script>
</body>
</html>

Related Customization

The border color and the border thickness of the markers can be customized using markerBorderColor and markerBorderThickness properties. Some other commonly used customization options include color, fillOpacity, etc.