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getservbyname — Gets the port number for a service.


mixed getservbyname(service_name, protocol_type);
string service_name: Service name
string protocol_type: Protocol name; either tcp or udp


Port number; FALSE on error


getservbyname() fetches the port number for the given service running under the given protocol, as defined in your system's /etc/services or c:\windows\servicesfile. If the protocol is not recognized, the function returns FALSE.


PHP Version: 4.0b4+

See also



Example 840. Find the HTTP service's default listening port

$protocol = 'tcp';
$service = 'http';
echo "The $service service listens on port ", getservbyname($service, $protocol), ' by default.';

PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing (Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch). This material may be distributed only subject to the terms and conditions set forth in the Open Publication License, v1.0 or later (the latest version is presently available at The authors of this book have elected not to choose any options under the OPL. This online book was obtained from and is designed to provide information about the PHP programming language, focusing on PHP version 4.0.4 for the most part. The information is provided on an as-is basis, and no warranty or fitness is implied. All persons and entities shall have neither liability nor responsibility to any person or entity with respect to any loss or damage arising from the information contained in this book.

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