Create php file named with Ping.php copy following code. For cass usage see bottom of this post. Note This script run online with root user privilege no web users
<?php
/*
Online PHP Examples with Source Code
website: http://4evertutorials.blogspot.in/
*/
// Name of Class Ping.php
/**
* Ping for PHP.
*
* This class pings a host.
*
* The ping() method pings a server using 'exec', 'socket', or 'fsockopen', and
* and returns FALSE if the server is unreachable within the given ttl/timeout,
* or the latency in milliseconds if the server is reachable.
*
* Example usage:
* @code
* $ping = new Ping('www.example.com');
* $latency = $ping->ping();
* @endcode
*
* @version 1.0-beta1
* @author Jeff Geerling.
*/
class Ping {
private $host;
private $ttl;
private $data = 'Ping';
/**
* Called when the Ping object is created.
*
* @param $host (string)
* The host to be pinged.
* @param $ttl (int)
* Time-to-live (TTL) (You may get a 'Time to live exceeded' error if this
* value is set too low. The TTL value indicates the scope or range in which
* a packet may be forwarded. By convention:
* - 0 = same host
* - 1 = same subnet
* - 32 = same site
* - 64 = same region
* - 128 = same continent
* - 255 = unrestricted
* The TTL is also used as a general 'timeout' value for fsockopen(), so if
* you are using that method, you might want to set a default of 5-10 sec to
* avoid blocking network connections.
*
* @return (empty)
*/
public function __construct($host, $ttl = 255) {
if (!isset($host)) {
throw new Exception("Error: Host name not supplied.");
}
$this->host = $host;
$this->ttl = $ttl;
}
/**
* Set the ttl (in hops).
*
* @param $ttl (int)
* TTL in hops.
*
* @return (empty)
*/
public function setTtl($ttl) {
$this->ttl = $ttl;
}
/**
* Set the host.
*
* @param $host (string)
* Host name or IP address.
*
* @return (empty)
*/
public function setHost($host) {
$this->host = $host;
}
/**
* Ping a host.
*
* @param $method (string)
* Method to use when pinging:
* - exec (default): Pings through the system ping command. Fast and
* robust, but a security risk if you pass through user-submitted data.
* - fsockopen: Pings a server on port 80.
* - socket: Creates a RAW network socket. Only usable in some
* environments, as creating a SOCK_RAW socket requires root privileges.
*
* @return (mixed)
* Latency as integer, in ms, if host is reachable or FALSE if host is down.
*/
public function ping($method = 'exec') {
$latency = false;
switch ($method) {
// The exec method uses the possibly insecure exec() function, which
// passes the input to the system. This is potentially VERY dangerous if
// you pass in any user-submitted data. Be SURE you sanitize your inputs!
case 'exec':
$ttl = escapeshellcmd($this->ttl);
$host = escapeshellcmd($this->host);
// -n = numeric output; -c = number of pings; -t = ttl.
$str = exec('ping -n -c 1 -t ' . $ttl . ' ' . $host, $output, $return);
// Second output line contains result of ping. Parse if not empty.
if (!empty($output[1])) {
$array = explode(' ', $output[1]);
// Remove 'time=' from string.
$latency = str_replace('time=', '', $array[6]);
// Convert latency to microseconds.
$latency = round($latency);
}
else {
$latency = false;
}
break;
// The fsockopen method simply tries to reach the host on port 80. This
// method is often the fastest, but not necessarily the most reliable.
// Even if a host doesn't respond, fsockopen may still make a connection.
case 'fsockopen':
$start = microtime(true);
$fp = fsockopen($this->host, 80, $errno, $errstr, $this->ttl);
if (!$fp) {
$latency = false;
}
else {
$latency = microtime(true) - $start;
$latency = round($latency * 1000);
}
break;
// The socket method uses raw network packet data to try sending an ICMP
// ping packet to a server, then measures the response time. Using this
// method requires the script to be run with root privileges, though, so
// this method only works reliably on Windows systems and on Linux servers
// where the script is not being run as a web user.
case 'socket':
// Create a package.
$type = "\x08";
$code = "\x00";
$checksum = "\x00\x00";
$identifier = "\x00\x00";
$seqNumber = "\x00\x00";
$package = $type . $code . $checksum . $identifier . $seqNumber . $this->data;
// Calculate the checksum.
$checksum = $this->calculateChecksum($package); // Calculate the checksum.
// Finalize the package.
$package = $type . $code . $checksum . $identifier . $seqNumber . $this->data;
// Create a socket, connect to server, then read the socket and calculate.
if ($socket = socket_create(AF_INET, SOCK_RAW, 1)) {
socket_connect($socket, $this->host, null);
$start = microtime(true);
// Send the package.
socket_send($socket, $package, strlen($package), 0);
if (socket_read($socket, 255) !== false) {
$latency = microtime(true) - $start;
$latency = round($latency * 1000);
}
else {
$latency = false;
}
// Close the socket.
socket_close($socket);
}
else {
$latency = false;
}
// Close the socket.
socket_close($socket);
break;
}
// Return the latency.
return $latency;
}
/**
* Calculate a checksum.
*
* @param $data (string)
* Data for which checksum will be calculated.
*
* @return (string)
* Binary string checksum of $data.
*/
private function calculateChecksum($data) {
if (strlen($data)%2) {
$data .= "\x00";
}
$bit = unpack('n*', $data);
$sum = array_sum($bit);
while ($sum >> 16) {
$sum = ($sum >> 16) + ($sum & 0xffff);
}
return pack('n*', ~$sum);
}
}
?>
Usage of class:
<?php
/*
Online PHP Examples with Source Code
website: http://4evertutorials.blogspot.in/
*/
require_once('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.';
}
?>
By: 4evertutorials
On 2/02/2013
