How can a coordinate system or network be created as a graphic in PHP to represent temperature values over time?

To create a coordinate system or network as a graphic in PHP to represent temperature values over time, you can use a library like GD or ImageMagick to generate the image. You would need to define the axes, plot the temperature values at specific time points, and then render the image to display the graph. 

<?php
// Create a blank image
$width = 800;
$height = 400;
$image = imagecreatetruecolor($width, $height);

// Define colors
$bgColor = imagecolorallocate($image, 255, 255, 255);
$axisColor = imagecolorallocate($image, 0, 0, 0);
$lineColor = imagecolorallocate($image, 0, 0, 255);

// Fill the background with white
imagefilledrectangle($image, 0, 0, $width, $height, $bgColor);

// Draw X and Y axis
imageline($image, 50, 50, 50, $height - 50, $axisColor);
imageline($image, 50, $height - 50, $width - 50, $height - 50, $axisColor);

// Plot temperature values over time
$temperatures = [20, 25, 30, 27, 22, 28]; // Example temperatures
$numTemperatures = count($temperatures);
$interval = ($width - 100) / ($numTemperatures - 1);

for ($i = 0; $i < $numTemperatures - 1; $i++) {
    $x1 = 50 + $i * $interval;
    $y1 = $height - 50 - $temperatures[$i] * 5;
    $x2 = 50 + ($i + 1) * $interval;
    $y2 = $height - 50 - $temperatures[$i + 1] * 5;
    
    imageline($image, $x1, $y1, $x2, $y2, $lineColor);
}

// Output the image
header('Content-type: image/png');
imagepng($image);

// Free up memory
imagedestroy($image);
?>

Keywords

Coordinate system network graphic PHP temperature values

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