php中 getservbyport getservbyname函数实例

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."
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."
n";         //输出结果
 
 
 
}