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
}