(PHP 4, PHP 5, PHP 7, PHP 8)
getprotobyname — Get protocol number associated with protocol name
$protocol
): int|false
getprotobyname() returns the protocol number
associated with the protocol protocol
as per
/etc/protocols.
protocol
The protocol name.
Returns the protocol number, or false
on failure.
Example #1 getprotobyname() example
<?php$protocol = 'tcp';$get_prot = getprotobyname($protocol);if ($get_prot === FALSE) { echo 'Invalid Protocol';} else { echo 'Protocol #' . $get_prot;}?>