getservbyname

(PHP 4, PHP 5)

getservbyname --  Get port number associated with an Internet service and protocol

Description

int getservbyname ( string service, string protocol )

getservbyname() returns the Internet port which corresponds to service for the specified protocol as per /etc/services. protocol is either "tcp" or "udp" (in lowercase). Returns FALSE if service or protocol is not found.

Example 1. getservbyname() example

<?php
$services 
= array('http''ftp''ssh''telnet''imap'
'smtp''nicname''gopher''finger''pop3''www');

foreach (
$services as $service) {                    
    
$port getservbyname($service'tcp');
    echo 
$service ": " $port "<br />\n";
}
?>

For complete list of port numbers see: http://www.iana.org/assignments/port-numbers.

See also: getservbyport().