(PHP 4, PHP 5, PHP 7)
getprotobynumber — Get protocol name associated with protocol number
$number
) : string
getprotobynumber() returns the protocol name
associated with protocol number as per
/etc/protocols.
numberThe protocol number.
Returns the protocol name as a string, 锟斤拷锟斤拷锟斤拷失锟斤拷时锟斤拷锟斤拷 FALSE.