[RESOLVED] Image Resize problem

longbow486

Ok, heres the full set of code, but the problem i am having is that the Width var is being passed to the custom imagegrid() functon before i can edit it with the IF statement. is there a way to get around this? i tried putting in a seperate php file and include it, but i get the same problem.

Thanks for the help in advance

-Phil

<?PHP
$source = "stella|00:0F:B3:FF:58:0A|Actiontec|0%|Open|WEP|802.11g|9|N 42.2504633|W 71.8319700|1 2 5.5 11|0 6 9 12 18 24 36 48 54|10-04-2007 11:37:41 393|10-04-2007 11:37:41 393|Infrastructure|Unknown|26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26";
$img = ImageCreateTrueColor($Width, $Height);
$bg = imagecolorallocate($img, 255, 255, 255);
$grid = imagecolorallocate($img,0,0,0);
$return = file($source);
$X = 20;
$wifissid = explode ("|", $return[0], 17);
$sgn= $wifissid[16];
$signal = explode("-", $sgn);
$count = count($signal);
$color = imagecolorallocate($img, 255, 0, 0);

function imagegrid($image, $w, $h, $s, $color)
{
    for($iw=0; $iw<$w/$s; $iw++){imageline($image, $iw*$s, 1, $iw*$s, $w, $color);}
    for($ih=0; $ih<$h/$s; $ih++){imageline($image, 1, $ih*$s, $w, $ih*$s, $color);}
}
        if ( 640 < $count)
		{
		$Width=640;
		$Height=480;
		$wid=$Width+$count;
		print $wid;
		}
        else
		{
		$wid=640;
		$Height=480;
		}
	foreach($signal as $sig)
	{
	imageline($img, $X ,460, $X, 460-($sig*4), $color);
	$X++;
	imageline($img, $X ,460, $X, 460-($sig*4), $color);
	$X=$X+2;
	}

$date=date('mdHis');
imagefill($img,0,0,$bg);
imagesetstyle($img,array($bg,$grid));
imagestring($img, 3, 25, 5,  $count, $color);

print $width;

imagegrid($img,$wid,$Height,19.99,$grid);
Print "You can find your Wifi Graph <a href=\"tmp/$date.png\">Here</a><br>";
Print "<img src=\"tmp/$date.png\">";
ImagePNG($img, "tmp/".$date.".png");
ImageDestroy($img);

?>

bpat1434

The $Width variable never gets passed to the function. The $wid variable does; however, you print $width instead of $wid.

So is your issue that the image is being created the wrong size, or is it that the printed number is wrong?

longbow486

Yes, the issue is that the image is the wrong size, when i print it it shows the correct value that i want it to set the image size to, but never acctually does it.
My initial size is 640x480 and i want it to get wider when the $signal array is larger then the width.

bpat1434

Removed - Figured the issue out I think, see the next post...

bpat1434

The below code makes more sense (calculations up top, image generation below)....

<?PHP
$source = "stella|00:0F:B3:FF:58:0A|Actiontec|0%|Open|WEP|802.11g|9|N 42.2504633|W 71.8319700|1 2 5.5 11|0 6 9 12 18 24 36 48 54|10-04-2007 11:37:41 393|10-04-2007 11:37:41 393|Infrastructure|Unknown|26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26-26";
$return = file($source);
$X = 20;
$wifissid = explode ("|", $return[0], 17);
$sgn= $wifissid[16];
$signal = explode("-", $sgn);
$count = count($signal);

if ( 640 < $count)
{
	$Width=640;
	$Height=480;
	$wid=$Width+$count;
}
else
{
	$wid=640;
	$Height=480;
}


$img = ImageCreateTrueColor($wid, $Height);
$bg = imagecolorallocate($img, 255, 255, 255);
$grid = imagecolorallocate($img,0,0,0);
$color = imagecolorallocate($img, 255, 0, 0);

function imagegrid($image, $w, $h, $s, $color)
{
	for($iw=0; $iw<$w/$s; $iw++){imageline($image, $iw*$s, 1, $iw*$s, $w, $color);}
	for($ih=0; $ih<$h/$s; $ih++){imageline($image, 1, $ih*$s, $w, $ih*$s, $color);}
}
foreach($signal as $sig)
{
	imageline($img, $X ,460, $X, 460-($sig*4), $color);
	$X++;
	imageline($img, $X ,460, $X, 460-($sig*4), $color);
	$X=$X+2;
}

$date=date('mdHis');
imagefill($img,0,0,$bg);
imagesetstyle($img,array($bg,$grid));
imagestring($img, 3, 25, 5,  $count, $color);

imagegrid($img,$wid,$Height,19.99,$grid);
Print "You can find your Wifi Graph <a href=\"tmp/$date.png\">Here</a><br>";
Print "<img src=\"tmp/$date.png\">";
ImagePNG($img, "tmp/".$date.".png");
ImageDestroy($img);

?>

Now, what are you trying to do with makegrid()? It does what is expected which is create a grid that is 640 x 480 pixels every time. If you're talking about that "red" area, then that's not in the function, but rather in the foreach($signal as $sig){} loop....

Is that what you're talking about?

longbow486

Dude, you rule, you have no idea how long i have been stuck on that one problem
Thanks so much man.

bpat1434

Okay, glad I could help.... note that I ammended my post above since it seems the read lines may not exactly be "right"..... but I'm not sure what you're going for.

longbow486

could you elaborate a little?

bpat1434

The red lines you draw in the lower left .... not sure what you're tying to accomplish with it. You have an image that is 640px wide, yet you use less than 1/2 of it. Is there a reason for it, or is that the way you want it.

longbow486

yeah that was just some sample data, the problem data i have is 1366 numbers in total, hence the need for more then 640px
the whole thing stated with my buddies program that he made for Vista when we were in Hawaii. i wanted to make a graphing script for it because his app doesnt have a graph export feature. so i took the export txt file and just used that. if you have a laptop and Vista you can use his app at http://techidiots.net/project-pages/vistumbler/