Resizing-a-displayed-image-without-GD


            // I wrote this function so that I could display thumbnails of pictures users 
// uploaded without having to actually modify the file. This function will return 
// a height and width to put in your  tag that will be proportionate to each 
// other. Again, the actual file is not modified, and GD is NOT required. Modifying 
// this to your needs should be pretty simple, but this will give you an idea on 
// how to do it. 
$pic = "image.jpg"; // This is the name of the image to modify 
$dimensions = resize($pic); // Here we call our function to get new 
height/width for the image. 
// Print it all our 
echo "\n\n"; 
echo "\n"; 
echo "\n"; 
function resize($v_pic) { // This is our main function 
 $largestside = 120; // This is the size of the LARGEST SIZE we 
want either our width or height to be 
 $size = GetImageSize ("$v_pic"); // Get the actual width/height of the 
image... 
 $width = $size[0]; 
 $height = $size[1]; 
 if ($width == $height) { // If the height == width 
 $dimensions[0] = $largestside; // Assign both width and height the value of 
$largestsize 
 $dimensions[1] = $largestside; 
 } elseif ($width > $height) { // If the width is greater than the 
height 
 $divisor = $width / $largestside; 
 $height = $height / $divisor; 
 $dimensions[0] = $largestsize; // Assign $largestsize to width 
 $dimensions[1] = intval ($height); // and assign $height a 
proportionate value to $height 
 } elseif ($width < $height) { // If width is less than height 
 $divisor = $height / 120; 
 $width = $width / $divisor; 
 $dimensions[0] = intval ($width); // Set width to be proportionate to height 
 $dimensions[1] = 120; // Set height to be $largestsize 
 } 
 return $dimensions; 
} 
?>
Graphics Php
