socket_cmsg_space

(PHP 5 >= 5.5.0, PHP 7, PHP 8)

socket_cmsg_space — Calculate message buffer size

socket_cmsg_space(int $level, int $type, int $num = 0): ?int

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

警告

本函数还未编写文档，仅有参数列表。