PHP를 사용하여 온라인 차트 및 데이터 시각화 디스플레이를 구현하는 방법

<?php
// 定义数据
$data = array(
    "January" => 10,
    "February" => 20,
    "March" => 15,
    "April" => 25,
    "May" => 30,
    "June" => 20
);

// 生成 JavaScript 代码
$jsCode = "
<script src='https://cdn.jsdelivr.net/npm/chart.js'></script>
<script>
    var ctx = document.getElementById('myChart').getContext('2d');
    var myChart = new Chart(ctx, {
        type: 'bar',
        data: {
            labels: " . json_encode(array_keys($data)) . ",
            datasets: [{
                label: 'Number of Sales',
                data: " . json_encode(array_values($data)) . ",
                backgroundColor: 'rgba(75, 192, 192, 0.2)',
                borderColor: 'rgba(75, 192, 192, 1)',
                borderWidth: 1
            }]
        },
        options: {
            scales: {
                y: {
                    beginAtZero: true
                }
            }
        }
    });
</script>
";

// 输出图表
echo "<canvas id='myChart' width='400' height='400'></canvas>";
echo $jsCode;
?>

<?php
// 定义数据
$data = array(
    array('Task', 'Hours per Day'),
    array('Work', 11),
    array('Eat', 2),
    array('Sleep', 7),
    array('Exercise', 4)
);

// 生成 HTML 代码
$htmlCode = "
<script type='text/javascript' src='https://www.gstatic.com/charts/loader.js'></script>
<script type='text/javascript'>
  google.charts.load('current', {'packages':['corechart']});
  google.charts.setOnLoadCallback(drawChart);

  function drawChart() {
    var data = google.visualization.arrayToDataTable(" . json_encode($data) . ");

    var options = {
      title: 'My Daily Activities',
      pieHole: 0.4,
    };

    var chart = new google.visualization.PieChart(document.getElementById('donutchart'));
    chart.draw(data, options);
  }
</script>
<div id='donutchart' style='width: 900px; height: 500px;'></div>
";

// 输出图表
echo $htmlCode;
?>