PHP | ImagickPixel setHSL() function

<?php
// Create a new imagickPixel object
$imagickPixel = new ImagickPixel();

// Set the HSL for pixel
$imagickPixel->setHSL(0.4, 0.4, 0.4);

// Get the HSL of pixel
$HSL = $imagickPixel->getHSL();
print("<pre>".print_r($HSL, true)."</pre>");
?>

<?php
// Create a new imagick object
$imagick = new Imagick(
    'https://media.geeksforgeeks.org/wp-content/uploads/geeksforgeeks-13.png');

// Get the pixel iterator to iterate through each pixel
$imageIterator = $imagick->getPixelIterator();

// Loop through pixel rows
foreach ($imageIterator as $row => $pixels) {
    // Loop through the pixels in the row
    foreach ($pixels as $column => $pixel) {

        // Get the current HSL
        $HSL = $pixel->getHSL();

        // Set the HSL and change only hue
        $pixel->setHSL(0.6, $HSL['saturation'], $HSL['luminosity']);

    }

    // Sync the iterator after each iteration
    $imageIterator->syncIterator();
}

header("Content-Type: image/jpg");
echo $imagick;
?>