基于canvasJS在PHP中制作动态图表详解
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CanvasJS
是一个JavaScript库,用于轻松为网页创建其他类型的图表。例如条形图,饼图,柱形图,面积图,折线图等。
让我们以需要创建一个图表的示例为例,在该图表中我们可以显示每月销售和购买的产品。我们将考虑两个数组,我们也可以从数据库中考虑它们。一旦我们从数据库中获取数据并将其存储在数组中,它就可以使用canvasJS轻松绘制动态图形。
创建一个文件并将其保存在项目文件夹中。文件名chart_sample.php
包含数组形式的数据,其中第一个数组代表购买的产品,第二个数组代表sols产品列表。现在,使用canvasJS绘制图形。
例如:
<?php // First array for purchased product $purchased= array(10, 15, 19, 0, 5, 7, 0, 0, 12, 13, 10, 1); // Second array for sold product $sold= array(7, 12, 14, 0, 3, 7, 0, 0, 10, 7, 5, 0); // Data to draw graph for purchased products $dataPoints = array( array("label"=> "Jan", "y"=> $purchased[0]), array("label"=> "Feb", "y"=> $purchased[1]), array("label"=> "March", "y"=> $purchased[2]), array("label"=> "April", "y"=> $purchased[3]), array("label"=> "May", "y"=> $purchased[4]), array("label"=> "Jun", "y"=> $purchased[5]), array("label"=> "July", "y"=> $purchased[6]), array("label"=> "Aug", "y"=> $purchased[7]), array("label"=> "Sep", "y"=> $purchased[8]), array("label"=> "Oct", "y"=> $purchased[9]), array("label"=> "Nov", "y"=> $purchased[10]), array("label"=> "Dec", "y"=> $purchased[11]) ); // Data to draw graph for sold products $dataPoints2 = array( array("label"=> "Jan", "y"=> $sold[0]), array("label"=> "Feb", "y"=> $sold[1]), array("label"=> "March", "y"=> $sold[2]), array("label"=> "April", "y"=> $sold[3]), array("label"=> "May", "y"=> $sold[4]), array("label"=> "Jun", "y"=> $sold[5]), array("label"=> "July", "y"=> $sold[6]), array("label"=> "Aug", "y"=> $sold[7]), array("label"=> "Sep", "y"=> $sold[8]), array("label"=> "Oct", "y"=> $sold[9]), array("label"=> "Nov", "y"=> $sold[10]), array("label"=> "Dec", "y"=> $sold[11]) ); ?>
<!DOCTYPE HTML> <html> <head> <script src="https://canvasjs.com/assets/script/canvasjs.min.js"> </script> <script> window.onload = function () { var chart = new CanvasJS.Chart("chartContainer", { animationEnabled: true, title:{ text: "Monthly Purchased and Sold Product" }, axisY: { title: "Purchased", titleFontColor: "#4F81BC", lineColor: "#4F81BC", labelFontColor: "#4F81BC", tickColor: "#4F81BC" }, axisY2: { title: "Sold", titleFontColor: "#C0504E", lineColor: "#C0504E", labelFontColor: "#C0504E", tickColor: "#C0504E" }, toolTip: { shared: true }, legend: { cursor:"pointer", itemclick: toggleDataSeries }, data: [{ type: "column", name: "Purchased", legendText: "Purchased", showInLegend: true, dataPoints:<?php echo json_encode($dataPoints, JSON_NUMERIC_CHECK); ?> }, { type: "column", name: "Sold", legendText: "Sold", axisYType: "secondary", showInLegend: true, dataPoints:<?php echo json_encode($dataPoints2, 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> <p id="chartContainer" style="height: 300px; width: 100%;"></p> </body> </html>
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