socket_cmsg_space
(PHP 5 >= 5.5.0, PHP 7, PHP 8)
socket_cmsg_space — Calculate message buffer size
说明
socket_cmsg_space(int
$level, int $type, int $num = 0): ?intCalculates 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。
参数
-
level -
-
type -
返回值
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