IP and port test for ping in PHP

Because the friend said the port is not connected, deliberately tried the ping test with PHP, the result is quite satisfactory.

The code and the run diagram are as follows: (if there is a great God to improve the better)

<?php

$host = ' www.php100.com ';

$port = ' 80 ';

$num = 3; Ping times

Get time

function Mt_f () {

List ($usec, $sec) = Explode ("", Microtime ());

Return ((float) $usec + (float) $sec); Microseconds plus seconds

}

function Ping_f ($host, $port) {

$time _s = Mt_f ();

$ip = gethostbyname ($host);

$fp = @fsockopen ($host, $port);

if (! $fp)

Return to ' reply time out! ';

$get = "Get/http/1.1\r\nhost:" $host. " \r\nconnect: ". $port." Close\r\n ";

Fputs ($fp, $get);

Fclose ($FP);

$time _e = Mt_f ();

$time = $time _e-$time _s;

$time = Ceil ($time * 1000);

Return to ' reply from '. $ip. ': $port. ' time = '. $time. ' Ms<br/> ';

}

echo ' ping to '. $host. ' ['. gethostbyname ($host). '] With Port: '. $port. ' Data:<br/> ';

for ($i = 0; $i < $num; $i + +) {

Echo Ping_f ($host, $port);

1S per run intermediate interval

Sleep (1);

Refreshing output caching

Ob_flush ();

Flush ();

}

?>