php实现的ping端口函数实例

具体实现代码如下：

代码如下:

<&＃63;php
/*
* @author xujiajay
* @date 2010-10-7
* @function 可以ping端口的php函数
*
*/
error_reporting(E_ERROR);
header("content-Type: text/html; charset=utf-8");
set_time_limit(120);
$host = isset($_POST['url']) &＃63; chop(str_replace('http://','',$_POST['url'])) : 'www.baidu.com';
$port = isset($_POST['duankou']) &＃63; chop($_POST['duankou']) : '80';
$num = 10;
function microtime_float()
{
list($usec, $sec) = explode(" ", microtime());
return ((float)$usec + (float)$sec);
}
function getsoft($host,$port)
{
$fp = @fsockopen($host,$port,&$errno,&$errstr,3);
if(!$fp) return 'unknown';
$get = "GET / HTTP/1.1\r\nHost:".$host."\r\nConnection: Close\r\n\r\n";
@fputs($fp,$get);
$data = '';
while ($fp && !feof($fp))
$data .= fread($fp, 1024);
@fclose($fp);
$array = explode("\n",$data);
$k = 2;
for($i = 0;$i <20;$i++)
{
if(stristr($array[$i],'Server')){$k = $i; break;}
}
if(!stristr($array[$k],'Server')) return 'unknown';
else return str_replace('Server','服务器软件',$array[$k]);
}
function ping($host,$port)
{
$time_start = microtime_float();
$ip = gethostbyname($host);
$fp = @fsockopen($host,$port,&$errno,&$errstr,1);
if(!$fp) return 'Request timed out.'."\r\n";
$get = "GET / HTTP/1.1\r\nHost:".$host."\r\nConnection: Close\r\n\r\n";
@fputs($fp,$get);
@fclose($fp);
$time_end = microtime_float();
$time = $time_end - $time_start;
$time = ceil($time * 1000);
return 'Reply from '.$ip.': time='.$time.'ms';
}
if(isset($_POST['url']) && isset($_POST['duankou']))
{
echo ''.getsoft($host,$port).'';
echo 'Pinging '.$host.' ['.gethostbyname($host).'] with Port:'.$port.' of data:'."\r\n";
ob_flush();
flush();
for($i = 0;$i <$num;$i++)
{
echo ping($host,$port);
ob_flush();
flush();
sleep(1);
}
}
&＃63;>

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希望本文所述对大家的PHP程序设计有所帮助。