php实现的ping端口函数实例

<?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']) ? chop(str_replace('http://','',$_POST['url'])) : 'www.baidu.com';
$port = isset($_POST['duankou']) ? 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 '<font color="#FF0000">'.getsoft($host,$port).'</font>';
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);
}
}
?>
<form method="POST">
域名/IP：<input type="text" name="url" value="<?php echo $host;?>" size="50">
端口：<input type="text" name="duankou" value="<?php echo $port;?>" size="10">
<input type="submit" value="ping">
</form>

希望本文所述对大家的PHP程序设计有所帮助。