Question

I'm trying to ping the ip address to test the ip address whether it is available or not. But i having trouble on using the fsockopen function. I had do some research on using 'ping','exec' function but none of them seem really workable.

Here is my code to test the IP address:

<?php
    $ipAddress = array("192.168.1.1","192.168.1.67");
    $kiosk = array("Kuantan (35)","UTC Kuantan (36)");

    $checkCount = 0;
    foreach(array_combine($ipAddress,$kiosk) as $items => $kiosk){
        $fp = @fSockOpen($items,80,$errno,$errstr,1);

        if(is_resource($fp)){
            if($fp) { 
                $status=0; 
                fclose($fp); 
                echo 'Success<br/>'; 
            }
        }
        else{
            echo 'Failed<br/>'; 

        }

    }
?>

Both the IP address i can ping from cmd prompt. But for 192.168.1.67 it lead me to 'Failed', only the 192.168.1.1. or 127.0.0.1 showing me 'Success'. Is there anything i do wrong?

Answer 1

您的代码并没有真正ping通，只是尝试在端口80上打开TCP连接.ping命令使用ICMP数据包，因此192.168.1.67可能不接受端口80上的连接。

在与Catalyst聊天之后，这是一个示例代码，它只发送两个数据包，并等待最多2秒钟的响应。 $ retval在成功时为0，在丢包时为1，在任何其他错误时为2。这是在Linux上，windows命令参数有点不同，但你应该能够改变它。

<?
// unset variables first to avoid mixing the results from previous calls
$retval=-1;
$output=array();
exec("ping 127.0.0.1 -c2 -w2 2>&1",$output,$retval);
echo "Return code: ".$retval."<br>\n";
echo implode("<br>\n",$output);
?>

PHP ping to get response with the ip address

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