Get absolute path of class file by its object

get_absolute_path_to_class_filename_by_object.php

<?php
/**
 * Get absolute path of class file by its object
 * @param $object Object instance
 * @return string|null
 */
function get_absolute_path_to_class_filename_by_object($object)
{
    $className = get_class($object);
    try {
        $reflection = new \ReflectionClass($className);
    } catch (ReflectionException $e) {
        return null;
    }
    return $reflection->getFileName();
}