getprotobynumber
(PHP 4, PHP 5, PHP 7, PHP 8)
getprotobynumber — Get protocol name associated with protocol number
说明
getprotobynumber
( int
$protocol
) : string|false
getprotobynumber() returns the protocol name
associated with protocol protocol as per
/etc/protocols.
参数
-
protocol -
The protocol number.
返回值
Returns the protocol name as a string, 或者在失败时返回 false.