(PHP 3 >= 3.0.7, PHP 4, PHP 5)
Serializes the passed variables and add the result to the fiven packet.
This function takes a variable number of parameters.
packet_id
A WDDX packet, returned by wddx_packet_start().
var_name
Can be either a string naming a variable or an array containing strings naming the variables or another array, etc.
...
如果成功则返回 TRUE,失败则返回 FALSE。