getservbyname

(PHP 4, PHP 5, PHP 7, PHP 8)

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

Description

function getservbyname(string $service, string $protocol): int|false

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).

Return Values

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

Examples

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";
}
?>

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