Reset all (public, protected, private) properties of a class hierarchy in a bottom-up approach

resetPropertiesInClassHierarcy.php

<?php
   
    /**
     * Use reflection to reset all properties in the hierarchy of the current object.
     *
     * Because lower level classes, might define / override their own property values, we need to reset in the proper
     * order: from parent to child
     *
     * @return void
     */
    private function resetClassProperties()
    {
        $reflectionClass = new ReflectionClass($this);
        $upstreamClasses = array($reflectionClass);
        while ($parentReflectionClass = $reflectionClass->getParentClass()) {
            $upstreamClasses[] = $parentReflectionClass;
            $reflectionClass = $parentReflectionClass;
        }

        //Reverse the upstream sequence of all involved classes to get the proper downstream approach
        $downstreamClasses = array_reverse($upstreamClasses);
        foreach ($downstreamClasses as $reflectionClass) {
            $this->resetReflectionClassProperties($reflectionClass);
        }
    }

    /**
     * @param ReflectionClass $reflectionClass
     * @return void
     */
    private function resetReflectionClassProperties(ReflectionClass $reflectionClass)
    {
        $classVariables = $reflectionClass->getDefaultProperties();
        if (count($classVariables) > 0) {
            foreach ($classVariables as $propertyName => $propertyValue) {
                $reflectionProperty = $reflectionClass->getProperty($propertyName);
                $reflectionProperty->setAccessible(true);
                $reflectionProperty->setValue($this, $propertyValue);
            }
        }
    }