TYPO3 / Fluid

        $propertyPath = $this->resolveSubVariableReferences($subject, $propertyPath);

        $propertyPathSegments = explode('.', $propertyPath);

        foreach ($propertyPathSegments as $index => $pathSegment) {

            $accessor = isset($accessors[$index]) ? $accessors[$index] : null;

            $subject = $this->extractSingleValue($subject, $pathSegment, $accessor);

            if ($subject === null) {

                break;

            }

        }

        return $subject;

    }

    {

        $accessors = [];

        $propertyPathSegments = explode('.', $propertyPath);

        foreach ($propertyPathSegments as $index => $pathSegment) {

            $accessor = $this->detectAccessor($subject, $pathSegment);

            if ($accessor === null) {

                // Note: this may include cases of sub-variable references. When such

                // a reference is encountered the accessor chain is stopped and new

                // accessors will be detected for the sub-variable and all following

                // path segments since the variable is now fully dynamic.

                break;

            }

            $accessors[] = $accessor;

            $subject = $this->extractSingleValue($subject, $pathSegment);

        }

        return $accessors;

    }