getservbyname

(PHP 4, PHP 5)

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

说明

int getservbyname ( string $service , string $protocol )

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

参数

service: The Internet service name, as a string.
protocol: protocol is either "tcp" or "udp" (in lowercase).

返回值

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

范例

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" ;
}
 ?>

参见

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