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Posted by Cristian Lavaque on 03/04/05 22:06
P80 wrote:
> hey all
> I'm looking for a simple script that would upload an image and resize it to
> thumbnail using a form to upload the picture. anyone has a good script for
> that?
>
> thanx in advance
>
> Pat
Hi Pat,
I wrote this function to resize pictures to the max width/height,
preserving proportions:
function resizeImage($src_file, $dst_file, $max_width, $max_height)
{
// Formats we will handle.
$formats = array('1' => 'gif', '2' => 'jpeg', '3' => 'png');
// Get info on the image.
if (!$sizes = getimagesize($src_file))
return false;
// A known and supported format?
if (!isset($formats[$sizes[2]]) || !function_exists('imagecreatefrom' .
$formats[$sizes[2]]))
return false;
// Create image from file.
$imagecreatefrom = 'imagecreatefrom' . $formats[$sizes[2]];
if (!$src_img = $imagecreatefrom($src_file))
return false;
// Calculate the new size.
$max = array('width' => $max_width, 'height' => $max_height);
$dst['width'] = $src['width'] = $sizes[0];
$dst['height'] = $src['height'] = $sizes[1];
foreach (array('width' => 'height', 'height' => 'width') as $k => $v)
if (!empty($max[$k]) && $dst[$k] > $max[$k])
{
$dst[$k] = $max[$k];
$dst[$v] = floor($src[$v] * $max[$k] / $src[$k]);
}
// Create true color image.
$dst_img = imagecreatetruecolor($dst['width'], $dst['height']);
// Do the resize.
if(!imagecopyresampled($dst_img, $src_img, 0, 0, 0, 0, $dst['width'],
$dst['height'], $src['width'], $src['height']))
return false;
// Save image to file.
imagejpeg($dst_img, $dst_file);
// Free the memory.
imagedestroy($src_img);
imagedestroy($dst_img);
return true;
}
It may not be exactly what you need, but I hope you find it helpful.
Regards,
Cristian
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