ping
is available on almost every OS. So you could make a system call and fetch the result.
With the following function you are just sending the pure ICMP packets using socket_create. I got the following code from a user note there. N.B. You must run the following as root.
Although you can't put this in a standard web page you can run it as a cron job and populate a database with the results.
So it's best suited if you need to monitor a site.
function twitterIsUp() {
return ping('twitter.com');
}
function ping ($host, $timeout = 1) {
/* ICMP ping packet with a pre-calculated checksum */
$package = "\x08\x00\x7d\x4b\x00\x00\x00\x00PingHost";
$socket = socket_create(AF_INET, SOCK_RAW, 1);
socket_set_option($socket, SOL_SOCKET, SO_RCVTIMEO, array('sec' => $timeout, 'usec' => 0));
socket_connect($socket, $host, null);
$ts = microtime(true);
socket_send($socket, $package, strLen($package), 0);
if (socket_read($socket, 255)) {
$result = microtime(true) - $ts;
} else {
$result = false;
}
socket_close($socket);
return $result;
}
Here's one:
http://www.planet-source-code.com/vb/scripts/ShowCode.asp?lngWId=8&txtCodeId=1786
Another:
function ping($host, $port, $timeout) {
$tB = microtime(true);
$fP = fSockOpen($host, $port, $errno, $errstr, $timeout);
if (!$fP) { return "down"; }
$tA = microtime(true);
return round((($tA - $tB) * 1000), 0)." ms";
}
//Echoing it will display the ping if the host is up, if not it'll say "down".
echo ping("www.google.com", 80, 10);
Another option (if you need/want to ping instead of send an HTTP request) is the Ping class for PHP. I wrote it for just this purpose, and it lets you use one of three supported methods to ping a server (some servers/environments only support one of the three methods).
Example usage:
require_once('Ping/Ping.php');
$host = 'www.example.com';
$ping = new Ping($host);
$latency = $ping->ping();
if ($latency) {
print 'Latency is ' . $latency . ' ms';
}
else {
print 'Host could not be reached.';
}
Using shell_exec:
<?php
$output = shell_exec('ping -c1 google.com');
echo "<pre>$output</pre>";
?>
this is php code I used, reply is usually like this:
2 packets transmitted, 2 received, 0% packet loss, time 1089ms
So I used code like this:
$ping_how_many = 2; $ping_result = shell_exec('ping -c '.$ping_how_many.' bing.com'); if( !preg_match('/'.$ping_how_many.' received/',$ping_result) ){ echo 'Bad ping result'. PHP_EOL; // goto next1; }
Source: Stackoverflow.com