php man page for getservbyname

GETSERVBYNAME(3)							 1							  GETSERVBYNAME(3)

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

SYNOPSIS
       int getservbyname (string  $service, string  $protocol)

DESCRIPTION
       getservbyname(3) returns the Internet port which corresponds to $service for the specified $protocol as per /etc/services.

PARAMETERS
	      o $service
		- The Internet service name, as a string.

	      o $protocol
		-$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(3) example

	      <?php
	      $services = array('http', 'ftp', 'ssh', 'telnet', 'imap',

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

SEE ALSO
       getservbyport(3), http://www.iana.org/assignments/port-numbers for a complete list of port numbers. .

PHP Documentation Group 													  GETSERVBYNAME(3)