public function serialize($var)
{
if (is_int($var)) {
return self::SER_INT . pack('N', $var);
} else {
if (is_array($var)) {
$serialized = self::SER_ARRAY;
$serialized .= pack('N', count($var));
foreach ($var as $key => $value) {
$serialized .= $this->serialize($key);
$serialized .= $this->serialize($value);
}
return $serialized;
} else {
if ($var === null) {
return self::SER_NULL;
} else {
$var = (string) $var;
$serialized = self::SER_STRING;
$serialized .= pack('N', StrUtil::byteLength($var));
$serialized .= $var;
return $serialized;
}
}
}
}
