getprotobyname

Description

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

例子 1. getprotobyname() example <?php $protocol = 'tcp'; $get_prot = getprotobyname($protocol); if ($get_prot == -1) {     // if nothing found, returns -1     echo 'Invalid Protocol'; } else {     echo 'Protocol #' . $get_prot; } ?>

See also: getprotobynumber().