Product::preparePropertyFields

protected function preparePropertyFields($fields)
{
	$result = [];
	$matches = [];

	foreach($fields as $name=>$value)
	{
		if (preg_match('/^(PROPERTY_)(d+)$/', $name, $matches))
		{
			$result[$matches[2]] = $value;
		}
	}
	return $result;
}