get useful imagemagick colorspace constants from getImageColorspace() as opposed to mystery integers

imagick_colorspace_constants.php

<?php
$reflection = new \ReflectionClass("\Imagick");
$colorspaces = array_flip(     
    array_filter(
        $reflection->getConstants(),
        function ($k) {
            return mb_strpos($k, "COLORSPACE") !== false;
        },
        ARRAY_FILTER_USE_KEY
    ) 
); 
// print_r($colorspaces); // if you want a list uncomment this
$image = new \Imagick($path);
echo $colorspaces[$image->getImageColorspace()];