PHP Box And Whisker Charts & Graphs

Download PHP Chart Samples

Box & Whisker Charts are used to show the distribution of numerical data through their quartiles, highlighting the median / mean values. Box & Whisker Charts also known as Box Plots. Given example shows PHP Box & Whisker Chart along with source code that you can try running locally.

<?php

$dataPoints = array(
	array("label" => "Web Developer", "y" => array(83133, 91830, 115828, 128982, 101381)),
	array("label" => "System Analyst", "y" => array(51910, 60143, 115056, 135450, 85800)),
	array("label" => "Application Engineer", "y" => array(63364, 71653, 91120, 100556, 80757)),
	array("label" => "Aerospace Engineer", "y" => array(82725, 94361, 118683, 129191, 107142)),
	array("label" => "Dentist", "y" => array(116777, 131082, 171679, 194336, 146794))
);

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

var chart = new CanvasJS.Chart("chartContainer", {
	animationEnabled: true,
	title:{
		text: "Annual Salary Range - USA"
	},
	axisY: {
		title: "Annual Salary (in USD)",
		prefix: "$",
		interval: 40000,
		labelFormatter: addSymbols
	},
	data: [{
		type: "boxAndWhisker",
		yValueFormatString: "$#,##0",
		dataPoints: <?php echo json_encode($dataPoints, JSON_NUMERIC_CHECK); ?>
	}]
});
chart.render();

function addSymbols(e){
	var suffixes = ["", "K", "M", "B"];

	var order = Math.max(Math.floor(Math.log(Math.abs(e.value)) / Math.log(1000)), 0);
	if(order > suffixes.length - 1)
		order = suffixes.length - 1;

	var suffix = suffixes[order];
	return CanvasJS.formatNumber(e.value / Math.pow(1000, order)) + suffix;
}

}
</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

upperBoxColor, lowerBoxColor, lineColor properties can be used to change the l;ook and feel of the box. The stem and whiskers can also be customized using stemColor, whiskerColor, stemThickness. Other related customization options are color,lineDashType, lineThickness, etc.