Gửi lệnh ping đến địa chỉ IP bằng PHP

Class này có thể dùng để kiểm tra tốc độ của 1 trang web, rất hay khi bạn muốn dùng để xem xét website đối thủ

Class NetPing

<?php
class Net_Ping {
var $icmp_socket;
var $request;
var $request_len;
var $reply;
var $errstr;
var $time;
var $timer_start_time;
function Net_Ping() {
$this->icmp_socket = socket_create(AF_INET, SOCK_RAW, 1);
socket_set_block($this->icmp_socket);
}
function ip_checksum($data) {
$sum=0;
for ($i = 0; $i < strlen($data); $i += 2) {
if ($data[$i + 1])
$bits = unpack('n*', $data[$i] . $data[$i + 1]);
else
$bits = unpack('C*', $data[$i]);
$sum += $bits[1];
}
while ($sum >> 16)
$sum = ($sum &; 0xffff) + ($sum >> 16);
$checksum = pack('n1', ~$sum);
return $checksum;
}
function start_time() {
$this->timer_start_time = microtime();
}
function get_time($acc=2) {
// format start time
$start_time = explode(" ", $this->timer_start_time);
$start_time = $start_time[1] + $start_time[0];
// get and format end time
$end_time = explode(" ", microtime());
$end_time = $end_time[1] + $end_time[0];
return number_format($end_time - $start_time, $acc);
}
function Build_Packet() {
$data = "abcdefghijklmnopqrstuvwabcdefghi"; // the actual test data
$type = "\x08"; // 8 echo message; 0 echo reply message
$code = "\x00"; // always 0 for this program
$chksm = "\x00\x00"; // generate checksum for icmp request
$id = "\x00\x00"; // we will have to work with this later
$sqn = "\x00\x00"; // we will have to work with this later
// now we need to change the checksum to the real checksum
$chksm = $this->ip_checksum($type . $code . $chksm . $id . $sqn . $data);
// now lets build the actual icmp packet
$this->request = $type . $code . $chksm . $id . $sqn . $data;
$this->request_len = strlen($this->request);
}
function Ping($dst_addr, $src_addr="", $timeout=5, $precision=3) {
// lets catch dumb people
if ($src_addr <> "") { //if there is no source, then ping via default >interface
>if (!socket_bind($this->icmp_socket, $src_addr, 0)) {
$errorcode = socket_last_error();
$errormsg = socket_strerror($errorcode);
die("Couldn't bind socket: [$errorcode] $errormsg\n");
}
}
if ((int) $timeout <= 0)
$timeout = 5;
if ((int) $precision <= 0)
$precision = 3;
// set the timeout
socket_set_option($this->icmp_socket,
SOL_SOCKET, // socket level
SO_RCVTIMEO, // timeout option
array(
"sec" => $timeout, // Timeout in seconds
"usec" => 0 // I assume timeout in microseconds
)
);
if ($dst_addr) {
if (@socket_connect($this->icmp_socket, $dst_addr, NULL)) {
} else {
$this->errstr = "Cannot connect to $dst_addr\n";
return FALSE;
}
$this->Build_Packet();
$this->start_time();
socket_write($this->icmp_socket, $this->request, $this->request_len);
if (@socket_recv($this->icmp_socket, &;$this->reply, 256, 0)) {
$this->time = $this->get_time($precision);
return $this->time;
} else {
$this->errstr = "Timed out";
return FALSE;
}
} else {
$this->errstr = "Destination address not specified";
return FALSE;
}
}
}
?>

Sử dụng

<?php
include 'netping.php';
$dest="lopphp.com";//Chỉ định địa chỉ cần ping
$src1="192.168.1.2";//ip máy của bạn.
$ping=new Net_Ping();
$ping->Ping($dest);
if ($ping->time)
echo "Time to $dest: " . $ping->time.PHP_EOL;
else
echo $ping->errstr;
$ping2=new Net_Ping();
$ping2->Ping($dest,$src1,5,10);
if ($ping2->time)
echo "<br />Time from $src1 to $dest: " . $ping2->time.PHP_EOL;
else
echo $ping->errstr;
?>