socket_cmsg_space()

(PHP 5 >= 5.5.0, PHP 7)

Calculate message buffer size

说明

socket_cmsg_space(int $level,int $type[,int $n= 0]): int

Calculates the size of the buffer that should be allocated for receiving the ancillary data.

Warning
本函数还未编写文档，仅有参数列表。