How can PHP be used to create a graphical representation of temperature trends over time?

To create a graphical representation of temperature trends over time using PHP, we can utilize a charting library like Google Charts or Chart.js. We can fetch temperature data from a database or an API, format it appropriately, and then pass it to the charting library to generate the graph. 

<?php

// Sample temperature data
$temperatures = [
    ['Date', 'Temperature'],
    ['2022-01-01', 25],
    ['2022-01-02', 28],
    ['2022-01-03', 30],
    ['2022-01-04', 26],
    ['2022-01-05', 29],
];

// Convert temperature data to JSON format
$temperatureJson = json_encode($temperatures);

?>

<!DOCTYPE html>
<html>
<head>
    <title>Temperature Trends</title>
    <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(<?php echo $temperatureJson; ?>);

            var options = {
                title: 'Temperature Trends',
                curveType: 'function',
                legend: { position: 'bottom' }
            };

            var chart = new google.visualization.LineChart(document.getElementById('chart_div'));

            chart.draw(data, options);
        }
    </script>
</head>
<body>
    <div id="chart_div" style="width: 900px; height: 500px;"></div>
</body>
</html>

Keywords

PHP graph temperature trends visualization time series

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