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PHP Range Area Charts & Graphs

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Range Area Charts are plotted by shading the area between a range of values (LOW & HIGH) and enveloping it with straight lines. Below example shows PHP Range Area Chart along with source code that you can try running locally.

  • PHP Code
<?php

 $dataPoints = array(
	array("x" => 1512441720000 , "y" => array(120, 78)),
	array("x" => 1512447240000 , "y" => array(147, 89)),
	array("x" => 1512453960000 , "y" => array(139, 85)),
	array("x" => 1512461700000 , "y" => array(160, 95)),
	array("x" => 1512466320000 , "y" => array(130, 84)),
	array("x" => 1512472020000 , "y" => array(138, 87)),
	array("x" => 1512475440000 , "y" => array(127, 78)),
	array("x" => 1512477540000 , "y" => array(119, 76)),
	array("x" => 1512482280000 , "y" => array(135, 82)),
	array("x" => 1512486900000 , "y" => array(122, 78)),
	array("x" => 1512490800000 , "y" => array(130, 82)),
	array("x" => 1512494160000 , "y" => array(122, 75))
 );

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

var chart = new CanvasJS.Chart("chartContainer", {
	animationEnabled: true,
	title:{
		text: "Blood Pressure Readings over a Day"
	},
	axisY: {
		title: "Pressure (in mmHg)",
		gridThickness: 0
	},
	data: [{
		type: "rangeArea",
		xValueType: "dateTime",
		xValueFormatString: "hh:MM TT",
		yValueFormatString: "#,##0 mmHg",
		toolTipContent: "{x}<br><b>Systolic:</b> {y[0]}<br><b>Diastolic:</b> {y[1]}",
		dataPoints: <?php echo json_encode($dataPoints); ?>
	}]
});

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

indexLabel property can be used to enable Index / Data Labels for the data points. Some of the other frequently used customization options include toolTipContent, showInLegend, etc.

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