Get port number associated with an Internet service and protocol
Syntax
getservbyname ( string $service , string $protocol ) : int
Parameters
serviceThe Internet service name, as a string.
protocolprotocol is either "tcp" or "udp" (in lowercase).
Return
Returns the port number, or FALSE if service or protocol is not found.
Examples
1 · service protocol
<? $service = "http"; $protocol = "tcp"; $return = getservbyname($service, $protocol); echo $return; ?>
80
2 · 1
<?
$array = array("finger", "ftp", "gopher", "http", "imap", "nicname", "pop3", "smtp", "ssh", "telnet", "www");
$protocol = "tcp";
foreach ($array as $service)
{
$return = getservbyname($service, $protocol);
echo "$service: $return\n";
}
?>finger: 79 ftp: 21 gopher: 70 http: 80 imap: 143 nicname: 43 pop3: 110 smtp: 25 ssh: 22 telnet: 23 www: 80
