$path = 'image.jpg'; // location of the image file $brightness = getBrightness($path); // get the brightness value echo "Brightness level: " . $brightness; // output the result
$url = 'https://example.com/image.jpg'; // the URL of the image file $path = tempnam(sys_get_temp_dir(), ''); // create a temporary file to store the image file_put_contents($path, file_get_contents($url)); // save the image to the temp file $brightness = getBrightness($path); // get the brightness value unlink($path); // delete the temp file echo "Brightness level: " . $brightness; // output the resultTo determine which package library contains the getBrightness function, you will need to refer to the documentation of the PHP image processing library you are using. For example, if you are using the GD library, the function is included as part of the library and you can use it directly. If you are using a third-party library like ImageMagick, you will need to ensure that the library is installed on your server and that the function is included in the library's documentation.