PHP Spline Charts & Graphs

Download PHP Chart Samples

Spline Charts are like Line Charts except that data points are connected using smooth curved lines. Spline charts are also called Smoothed / Curved Line Chart. The given example shows simple PHP Spline Chart. It also includes source code that you can try running locally.

<?php

 $dataPoints = array(
	array("x" => 946665000000, "y" => 3289000),
	array("x" => 978287400000, "y" => 3830000),
	array("x" => 1009823400000, "y" => 2009000),
	array("x" => 1041359400000, "y" => 2840000),
	array("x" => 1072895400000, "y" => 2396000),
	array("x" => 1104517800000, "y" => 1613000),
	array("x" => 1136053800000, "y" => 1821000),
	array("x" => 1167589800000, "y" => 2000000),
	array("x" => 1199125800000, "y" => 1397000),
	array("x" => 1230748200000, "y" => 2506000),
	array("x" => 1262284200000, "y" => 6704000),
	array("x" => 1293820200000, "y" => 5704000),
	array("x" => 1325356200000, "y" => 4009000),
	array("x" => 1356978600000, "y" => 3026000),
	array("x" => 1388514600000, "y" => 2394000),
	array("x" => 1420050600000, "y" => 1872000),
	array("x" => 1451586600000, "y" => 2140000)
 );

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

var chart = new CanvasJS.Chart("chartContainer", {
	animationEnabled: true,
	title:{
		text: "Company Revenue by Year"
	},
	axisY: {
		title: "Revenue in USD",
		valueFormatString: "#0,,.",
		suffix: "mn",
		prefix: "$"
	},
	data: [{
		type: "spline",
		markerSize: 5,
		xValueFormatString: "YYYY",
		yValueFormatString: "$#,##0.##",
		xValueType: "dateTime",
		dataPoints: <?php echo json_encode($dataPoints, JSON_NUMERIC_CHECK); ?>
	}]
});

chart.render();

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

Chart Customizations

You can enable the export feature in the chart by setting exportEnabled to true. Some other frequently used customization options include lineThickness, lineColor, markerSize, markerType, etc.