simple ping code

[Birdmansplace]

been searchin the site/web  and found code thats simple but doesnt work.

 

I have a personal web server running with various things and a place to upload or down load files from out side my lan.

 

I am lookin for a basic code that can use the servers system host file to ping the rest of the network computers. Simple as Computer a: on or off, computer b,c,d,e and so on. no need for time just a single request to find out if its on or not.

 

thanks

 

 

 

[redarrow]

read this please cheers.

 

http://www.webmasterworld.com/php/3544745.htm

[Birdmansplace]

thanks...

 

code that works for me

 

<?php include("html/sidebar.html"); ?>

  <div id="mainContent">
    <h1> Main Content </h1>
    <p><?php
 $ping_ex = exec("ping -c4 127.0.0.1", $ping_result, $pr);

if (count($ping_result) > 1){
echo 'Ping online - response';
} else {
echo 'Ping offline - response';
} 
?>

[Birdmansplace]

only one problem.  regardless of the state thecomputer is i get online no matter what

 

[oni-kun]

  Quote

only one problem.  regardless of the state thecomputer is i get online no matter what

 

if (count($ping_result) > 1){

 

What is the output if it cannot be found? "Host not reachable" IS > 1. You can't compare it that easily, you'll need to check if it is a number or a string.

[Birdmansplace]

  Quote

 

 

if (count($ping_result) > 1){

 

What is the output if it cannot be found? "Host not reachable" IS > 1. You can't compare it that easily, you'll need to check if it is a number or a string.

 

how would i go about doing that?

[MadTechie]

Personally I don't like using exec, using sockets or fsockets works fine,

example

<?php
$URL = "www.phpfreaks.com";

$X = Ping($URL,300);
if($X == 0){
echo 'Ping offline - response';
}else{
echo 'Ping online - response';
}


function Ping($WebServer,$timeout=10,$Port = 80){
Set_Time_Limit(0);  //Time for script to run .. not sure how it works with 0 but you need it
Ignore_User_Abort(True); //this will force the script running at the end

$handle = @fsockopen($WebServer, $Port,$errno,$errstr,$timeout);
if (!$handle){
	//echo "Failed to open ProxyServer $WebServer errno=$errno,errstr=$errstr<br>";
	return 0;
}
else {
	$status = socket_get_status($handle);

	//Time the responce
	list($usec, $sec) = explode(" ", microtime(true));
	$start=(float)$usec + (float)$sec;


	$timeout=120;
	stream_set_timeout($handle,$timeout);
	//send somthing
	ini_set('display_errors','0');
	$write=fwrite($handle,"echo this\n");
	if(!$write){
		return 0;
	}

	stream_set_blocking($handle,0);
	//Try to read. the server will most likely respond with a "ICMP Destination Unreachable" and end the read. But that is a responce!
	fread($handle,1024);
	fclose($handle);
	ini_set('display_errors','1');

	//Work out if we got a responce and time it
	list($usec, $sec) = explode(" ", microtime(true));
	$laptime=((float)$usec + (float)$sec)-$start;
	if($laptime>$timeout) return 0;
	return $laptime;
}
}

?>

[MadTechie]

Oh but if you use the exec then you can check it like this

$ping_ex = exec("ping 127.0.0.1", $ping_result, $pr);

$valid = false;
foreach($ping_result as $R){
if(stripos($R,"Reply from") !== false) $valid = true;
}
if($valid){ echo "On-line"; }else{ echo "Off-line";}

 

[Birdmansplace]

  Quote

Oh but if you use the exec then you can check it like this

$ping_ex = exec("ping 127.0.0.1", $ping_result, $pr);

$valid = false;
foreach($ping_result as $R){
if(stripos($R,"Reply from") !== false) $valid = true;
}
if($valid){ echo "On-line"; }else{ echo "Off-line";}

 

this doesnt work.  and cant figure out why.  no matter what ip i give it says off line.

 

thanks for the help

[MadTechie]

Try his for debugging

<?php
$ping_ex = exec("ping 127.0.0.1", $ping_result, $pr);

$valid = false;
foreach($ping_result as $R){
if(stripos($R,"Reply from") !== false) $valid = true;
}
if($valid){
echo "On-line";
}else{
echo "Off-line";
echo "$ping_ex - ".implode("<br>\n",$ping_result);
}

[Birdmansplace]

<?php
$ping_ex = exec("ping -c4 127.0.0.1", $ping_result, $pr);

$valid = false;
foreach($ping_result as $R){
   if(stripos($R,"Reply from") !== false) $valid = true;
}
if($valid){
   echo "On-line";
}else{
   echo "Off-line";
   echo "$ping_ex - ".implode("<br>\n",$ping_result);
}
?>

 

output:

(debian os)

 

Off-linertt min/avg/max/mdev = 0.017/0.022/0.029/0.006 ms - PING 127.0.0.1 (127.0.0.1) 56(84) bytes of data.

64 bytes from 127.0.0.1: icmp_seq=1 ttl=64 time=0.029 ms

64 bytes from 127.0.0.1: icmp_seq=2 ttl=64 time=0.026 ms

64 bytes from 127.0.0.1: icmp_seq=3 ttl=64 time=0.017 ms

64 bytes from 127.0.0.1: icmp_seq=4 ttl=64 time=0.017 ms

 

--- 127.0.0.1 ping statistics ---

4 packets transmitted, 4 received, 0% packet loss, time 2997ms

rtt min/avg/max/mdev = 0.017/0.022/0.029/0.006 ms

 

output 2:

(winblows)

Off-linertt min/avg/max/mdev = 0.059/0.074/0.081/0.012 ms - PING 192.168.1.86 (192.168.1.86) 56(84) bytes of data.

64 bytes from 192.168.1.86: icmp_seq=1 ttl=128 time=0.059 ms

64 bytes from 192.168.1.86: icmp_seq=2 ttl=128 time=0.081 ms

64 bytes from 192.168.1.86: icmp_seq=3 ttl=128 time=0.081 ms

64 bytes from 192.168.1.86: icmp_seq=4 ttl=128 time=0.077 ms

 

--- 192.168.1.86 ping statistics ---

4 packets transmitted, 4 received, 0% packet loss, time 2997ms

rtt min/avg/max/mdev = 0.059/0.074/0.081/0.012 ms

[MadTechie]

replace

if(stripos($R,"Reply from") !== false) $valid = true;

 

with

if(preg_match('/(\d+) packets transmitted, \1/i', $R)) $valid = true;

 

all its going to do it check that the transmitted and received are the same

  Quote

4 packets transmitted, 4 received, 0% packet loss, time 2997ms

 

or

if(preg_match('/\d+ packets transmitted, \d+ received, 0% packet loss/i', $R)) $valid = true;

to check no packets where lost

 

~OR~

 

you could do this

if(preg_match('/([1-9]\d*) packets transmitted/i', $R)) $valid = true;

to check at least 1 packet made it

[Birdmansplace]

  Quote

replace

if(stripos($R,"Reply from") !== false) $valid = true;

 

with

if(preg_match('/(\d+) packets transmitted, \1/i', $R)) $valid = true;

 

changing code worked

 

<?php
$ping_ex = exec("ping -c4 127.0.0.1", $ping_result, $pr);

$valid = false;
foreach($ping_result as $R){
   if(preg_match('/(\d+) packets transmitted, \1/i', $R)) $valid = true;
}
if($valid){
   echo "On-line";
}else{
   echo "Off-line";
   echo "$ping_ex - ".implode("<br>\n",$ping_result); <!-- remove to remove debug -->
}
?>

[Birdmansplace]

thanks MadTechie!

[MadTechie]

Your welcome,

 

as a note the line

if(stripos($R,"Reply from") !== false) $valid = true;

worked on my WinXP machine (running wampserver)

[Andy-H]

I don't know the solution to this but the code supplied is pinging the loopback address of the server; therefore will only test if the server is online. Are you using static IP addresses on your computers or using DHCP to setup dynamic addresses?

 

  Quote

I am lookin for a basic code that can use the servers system host fileto ping the rest of the network computers. Simple as Computer a: on oroff, computer b,c,d,e and so on. no need for time just a single requestto find out if its on or not.

[Birdmansplace]

  Quote

I don't know the solution to this but the code supplied is pinging the loopback address of the server; therefore will only test if the server is online. Are you using static IP addresses on your computers or using DHCP to setup dynamic addresses?

 

 

static dhcp for 6 machines

[MadTechie]

If you read the whole thread your see that this has already been solved and the loopback IP was used as an example.

[Andy-H]

  Quote

If you read the whole thread your see that this has already been solved and the loopback IP was used as an example.

 

Fair enough.

[Birdmansplace]

also noticed a small issue with the code.

 

if you use this many times on one page the code for some reason list any machine after the first one found online will show online.

example

 

computer a: off-line    (is off)

computer b: online    (is on)

computer c: online    (is off)

computer d: online  (is off)

computer e: online (is off) lol is unpluged from the wall even atm.

 

so i am thinking i may have to make a page with code for one computer at a time and see if same affect when include each to one page.

[Andy-H]

Can you shouw the code you are running to get that result?

[MadTechie]

Have you tried the fsocket one, instead (that's my preferred method)

[Birdmansplace]

  Quote

Have you tried the fsocket one, instead (that's my preferred method)

 

Yeah and from the looks of the code its pinging the http port.  sence i only have one webserver in the house i couldnt see it working at all.

 

 

  Quote

also noticed a small issue with the code.

 

if you use this many times on one page the code for some reason list any machine after the first one found online will show online.

example

 

computer a: off-line    (is off)

computer b: online    (is on)

computer c: online    (is off)

computer d: online  (is off)

computer e: online (is off) lol is unpluged from the wall even atm.

 

so i am thinking i may have to make a page with code for one computer at a time and see if same affect when include each to one page.

 

yeap no change. o well

[MadTechie]

Humm.. well if ping is responding, then its not turned off!

 

I assume you also get a response from terminal.

[Birdmansplace]

in terminal the computers that are on are responding to ping are replying.  the ones that are not on are coming back destination host unreachable.

 

i have out a note by each computer that is actually on or off.

http://birdmansplace.com/birdman/