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<?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 繪制折線圖? ? 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>