<?php// Get the data entered by the user $data = $_POST['data'];
// Process the data entered by the user and generate the parameters required for drawing $chartData = processData ($data);$chartTitle = generateTitle($data);
// Draw a chart drawChart($chartData, $chartTitle);
/*** Process the data input by the user and return the parameters required for drawing * * @param string $data The data input by the user * @return array The parameters required for drawing*/function processData( $data){ // The data input by the user is processed here, such as parsing, filtering, calculation, etc. // The processed data should comply with the format required by the drawing library, such as array or JSON format
// Example: Assume that the data format entered by the user is a comma-separated numeric string $numbers = explode(',', $data); $chartData = [ 'x' => range(1, count($numbers)), ' y' => $numbers ];
return $chartData;}
/*** Generate chart title based on user input * * @param string $data Data entered by user * @return string Chart title*/function generateTitle($data){ // Here based on the data entered by the user Generate chart titles // You can use string splicing, conditional judgment, etc.
// Example: Assume that the data entered by the user is a numeric string, and the title is the sum of the data $numbers = explode(',', $data ); $sum = array_sum($numbers); $chartTitle = 'Chart Title: Sum of Numbers is ' . $sum;
return $chartTitle;}
/*** Draw a chart * * @param array $chartData Parameters required for drawing * @param string $chartTitle Chart title */function drawChart($chartData, $chartTitle){ // Use a drawing library (such as Chart.js, Google Charts, etc.) to draw charts // Configure and draw according to the provided parameters
// 示例：使用 Chart.js 绘制折线图 echo '<html>'; echo '<head>'; echo '<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>'; echo '</head>'; echo '<body>'; echo '<canvas id="myChart" width="400" height="400"></canvas>'; echo '<script>'; echo 'var ctx = document.getElementById("myChart").getContext("2d");'; echo 'var myChart = new Chart(ctx, {'; echo ' type: "line",'; echo ' data: {'; echo ' labels: ' . json_encode($chartData['x']) . ','; echo ' datasets: [{'; echo ' label: "' . $chartTitle . '",'; echo ' data: ' . json_encode($chartData['y']) . ','; echo ' borderColor: "rgb(75, 192, 192)",'; echo ' tension: 0.1'; echo ' }]'; echo ' },'; echo ' options: {}'; echo '});'; echo '</script>'; echo '</body>'; echo '</html>
