PHP | ImagickPixel getIndex() function

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

// Get the index
$index = $imagickPixel->getIndex();
echo $index;
?>

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

// Set the index
$imagickPixel->setIndex(5);

// Get the index
$index = $imagickPixel->getIndex();
echo $index;
?>

<?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) {

    foreach ($pixels as $column => $pixel) {
        // Get the index of each pixel of image
        echo $pixel->getindex() . '<br>';

    }

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