/**
* Create a serialized string from arguments.
* Used to hash and index keys.
* @param array $args
* @return string
*/
private static function remSerializeArgs($args)
{
$stringify = function (&$value, $index) {
if (is_array($value)) {
$value = self::remSerializeArgs($value);
} elseif (!is_string($value) && method_exists($value, 'remId')) {
$id = $value->remId();
if (null === $id || "" === $id) {
throw new \Exception("remId() must be non-null and non-empty.");
}
$reflection = new \ReflectionClass($value);
$value = new Id($reflection->getName(), $value->remId());
}
};
// deep copy
$args_copy = unserialize(serialize($args));
array_walk_recursive($args_copy, $stringify);
return serialize($args_copy);
}
