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基於canvasJS在PHP中製作動態圖表詳解

coldplay.xixi轉載: 2020-08-04 15:48:582667瀏覽

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CanvasJS是一個JavaScript函式庫，用來輕鬆為網頁建立其他類型的圖表。例如長條圖，圓餅圖，長條圖，面積圖，折線圖等。

讓我們以需要建立一個圖表的範例為例，在該圖表中我們可以顯示每月銷售和購買的產品。我們將考慮兩個數組，我們也可以從資料庫中考慮它們。一旦我們從資料庫中獲取資料並將其儲存在數組中，它就可以使用canvasJS輕鬆繪製動態圖形。

建立一個檔案並將其保存在專案資料夾中。檔案名稱chart_sample.php包含陣列形式的數據，其中第一個陣列代表購買的產品，第二個陣列代表sols產品列表。現在，使用canvasJS繪製圖形。

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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