wddx_packet_start -- Starts a new WDDX packet with structure inside it
说明
resource wddx_packet_start ( [string comment] )
Start a new WDDX packet for incremental addition of variables.
It automatically creates a structure definition inside the packet to
contain the variables.
参数
comment
An optional comment string.
返回值
Returns a packet ID for use in later functions, or FALSE on error.