Get port number associated with an Internet service and protocol

# getservbyname

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

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

### Description

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";
}
?>`

### See Also

- getservbyport() - Get Internet service which corresponds to port and protocol
- » http://www.iana.org/assignments/port-numbers for a complete list of port numbers.

`↑` and `↓` to navigate • `Enter` to select • `Esc` to close • `/` to open