PHP - Ratio From Two Numbers

I can't remember the math to do this, but I use MySQL to calculate an average:

5 = 100%
0 = 0%

I want to make a bar that shows an average (like a bar graph)

so lets say I get 2.5 as one of my returned results, that means the bar should only be 50% long of the maximum width.

Using calculations, how can I get the number 50 (the max width is 100% of a table cell)?

Is there such a function which allows you pass the image url into a function, it then resizes the image keeping its aspect ratio so that people don't look fat or thin when the picture is in thumbnail form ?

Can't see to do it in standard CSS so im wondering if php can some how do it =/ ?

Hey, I want to be able to have a 100x100 thumbnail of pictures I am uploading while cropping the image to maintain the ratio. Right now I am stretching the image and it looks bad but it works. Here is my code...

Quote

$new_thumb = "$new_pic";
$sourcefile = "$target2$pic";
$picsize = getimagesize("$target2$pic");
$source_x = $picsize[0];
$source_y = $picsize[1];

$dest_x = 100;
$dest_y = 100;


$targetfile = "$thumbs$pic";

$pathtofile = pathinfo($sourcefile);
$extension = $pathtofile['extension'];
$jpegqual = 75;

   if($extension=='jpg' || $extension=='jpeg' || $extension=='JPG') {
$source_id = imagecreatefromjpeg("$target2$pic");
$target_id = imagecreatetruecolor($dest_x, $dest_y);
$target_pic = imagecopyresized($target_id,$source_id,0,0,0,0,$dest_x,$dest_y,$source_x,$source_y);
imagejpeg($target_id,"$targetfile",$jpegqual);
}
if($extension=='gif') {
$source_id = imagecreatefromgif("$target2$pic");
$target_id = imagecreatetruecolor($dest_x, $dest_y);
$target_pic = imagecopyresized($target_id,$source_id,0,0,0,0,$dest_x,$dest_y,$source_x,$source_y);
imagegif($target_id,"$targetfile",$jpegqual);
}
if($extension=='png') {
$source_id = imagecreatefrompng("$target2$pic");
$target_id = imagecreatetruecolor($dest_x, $dest_y);
$target_pic = imagecopyresized($target_id,$source_id,0,0,0,0,$dest_x,$dest_y,$source_x,$source_y);
imagepng($target_id,"$targetfile",$jpegqual);
}



How could I change this to make the thumbnails maintain the aspect ratio but still be 100x100?

Hey, I know how to use the PHP GD functions but how would I resize an image > 1000 width to 1000 width and just resizing the height to w/e needed to keep aspect ratio if the image is set to 1000 width in pixels of course. I don't mess with images much so idk the whole ratio thing.

Hi,
I need to sort variables in groups of up to 15 and put it in an array. For example:
$exstract['center_tabOpBody_0'] =5
$exstract['center_tabOpBody_1'] =6
$exstract['center_tabOpBody_2'] =8
$exstract['center_tabOpBody_3'] =1


Should yield:
ARRAY(
          = center_tabOpBody_1,center_tabOpBody_2,center_tabOpBody_3 // <-----15 [1] = center_tabOpBody_0 //<----5
)

Is there some simple function do do the "efficiency" sort?

Thanks,
Vadim