(PHP 4, PHP 5)
getservbyname — Get port number associated with an Internet service and protocol
getservbyname() returns the Internet port which corresponds to service for the specified protocol as per /etc/services.
The Internet service name, as a string.
protocol is either "tcp" or "udp" (in lowercase).
Returns the port number, or FALSE if service or protocol is not found.
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";
}
?>