getservbyname

(PHP 4, PHP 5, PHP 7)

Get port number associated with an Internet service and protocol

int getservbyname ( string $service, string $protocol )

getservbyname() returns the Internet port which corresponds to service for the specified protocol as per /etc/services.

Parameters:

service

The Internet service name, as a string.

protocol

protocol is either "tcp" or "udp" (in lowercase).

Returns:

Returns the port number, or FALSE if service or protocol is not found.

Examples:

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";
}
?>