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getprotobyname	getservbyname

Network Functions	Last updated: Mon, 26 Oct 2026

getprotobynumber

(PHP 4, PHP 5, PHP 7, PHP 8)

getprotobynumber — Get protocol name associated with protocol number

Description

function getprotobynumber(int $protocol): string|false

getprotobynumber() returns the protocol name associated with protocol protocol as per /etc/protocols.

Parameters

protocol: The protocol number.

Return Values

Returns the protocol name as a string, or false on failure.

See Also

getprotobyname() - Get protocol number associated with protocol name

getprotobyname	getservbyname

Network Functions	Last updated: Mon, 26 Oct 2026