[SOLVED] Dynamic Image From User Input

[Rathlar]

Ok... well I'm trying to do an online/offline status image code which users can modify the url to output their own custom status checker.

 

here's the code I have so far... I know it's kinda sloppy but I just need it to work and then I can clean it up later.

<?php

Function testconn()
{
	$socket = @socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
	$address = gethostbyname($_GET['host']);
	$service_port = $_GET['port'];
	$result = socket_connect($socket, $address, $service_port);
	if($result == "")
		{
		$im = imagecreatefrompng($_GET['offline']);
		}
	else
		{
		$im = imagecreatefrompng($_GET['online']);
		}
}
header("Content-Type: image/png");
testconn();
imagepng($im);
imagedestroy($im);

?>

I also know this requires allow_url_fopen to be turned on in php.ini which I do have on.

 

So far all I can manage to get is the url displayed in the browser with no errors other than the fact that the image isnt showing up.

 

Any help would be greatly appreciated.

[micah1701]

not really sure i'm following your code, but for starters $im is not a global var because its in your function.

 

at the end of your function, before the last bracket }  you need:  return $im;

 

then, when you call the function, asign $im to a var; like this: $im = testconn();

[Rathlar]

I did exactly what you told me and it still won't output the image.

 

			}
return $im;
}
header("Content-Type: image/png");
$im = testconn();
imagepng($im);
imagedestroy($im);

?>

 

Same exact result as before...

 

Basically what I'm trying to do is when the user uses the URL:

/status.php?offline=URL_of_PNG1&online=URL_of_PNG2&host=HOSTNAME&port=PORT_NUM

 

They will be displayed the server status of the server they chose in the URL in png output.

 

More or less a dynamic image based on the user input and conditional based on the results of the socket connection.

[Rathlar]

Actually I figured out this is a sockets problem... call to undefined function... seems to be a fairly common problem from what I'm reading.

[Rathlar]

gah... triple posting... i wish i could edit my posts...

 

anyway I fixed it myself... i should have been doing sockets differently...

 

<?php 
header("Content-Type: image/png");
$address = gethostbyname($_GET['host']);
$port = $_GET['port'];
if (! $sock = @fsockopen($address, $port, $num, $error, 5)) 
  $im = imagecreatefrompng($_GET['offline']); 
else{ 
  $im = imagecreatefrompng($_GET['online']); 
  fclose($sock);
}
imagepng($im); 
?>

 

less code and works like a charm