php中getservbyport与getservbyname函数用法实例

string getservbyport ( int $port , string $protocol )
 
*/
$services=array(80,21,22,23,25,143);      //定义数组
foreach($services as $service)         //循环读取内容
{
  $protocol=getservbyport($service,tcp);       //返回端口号对应的协议
  echo $service.":".$protocol."<br/>n";       //输出结果
}
 
/*
int getservbyname ( string $service , string $protocol )
*/
 
$services=array(http,ftp,ssh,telnet,imap,
smtp,nicname,gopher,finger,pop3,www);       //定义一个数组
foreach($services as $service)          //循环读取内容
{
  $port=getservbyname($service,tcp);        //获取数组元素对应端口
  echo $service.":".$port."<br/>n";         //输出结果
}