PHP ping，甚至1个请求超时

I have been using the script below, however, I want it to ping 3-4 times, and within that 3-4 times if it has even a single request timeout, I want php to come back as failed.

Here's a script I'm using:

 <?php

function pingAddressHasNeverFailed($tries) {
    for ($i = 0; $i < $tries; $i++) {
        $pingresult = shell_exec("ping -c 1 www.google.com", $outcome, $status);
        if ($status != 0)
            return false;
    }
    return true;
}

if (pingAddressHasNeverFailed(3)) {
    echo "uoc gi";
}
?>

Please help if you can, thank you so much in advance!

If any ping fails (in a set) it will not have 0% in the output (i.e. 0% packet loss), which is the same for Linux and Windows:

function ping($host, $times = 3)
{
  exec("/bin/ping -c 3 $host", $out, $status);

  return $status === 0 && false !== strpos(join('', $out), '0%');
}

if (ping('www.google.com)) {
  echo "yay
";
} else {
  echo "oh dear
";
}

You may have to adjust the ping arguments to fit your environment and make sure that the host name is sanitized.

In that case you'll need to execute command n (n is a number of tries) times. E.g.:

function pingAddressHasNeverFailed($tries) {
    $outcome = array();
    $status = -1;

    for ($i = 0; $i < $tries; $i++) {
        $pingresult = exec("/bin/ping -n 1 www.google.com", $outcome, $status);
        if ($status != 0)
            return false;
    }
    return true;
}

Usage:

if (pingAddressHasNeverFailed(3)) {
    //do something useful
}