"Edward Peloke" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
> won't the gd library do this?
>
> http://www.php.net/manual/en/function.exif-thumbnail.php
>
> if there is a better function..I am interested in it also as I have to do
> this something this week for a project.
>
> Thanks,
> Eddie
This is what I'm using (of course the GD library is required). Hope the
comments make everything clear. I have only used it with JPEGs, though:
/**
* Creates and saves a thumbnail of the supplied image
*
* @param string $fileName source file name
* @param string $sourceDir source directory
* @param string $targetDir target directory
* @param string $fileNameExtension file name extension (e.g.:
image.jpeg -> image_thumb.jpg)
* @param integer $dimension target image
* @param string $dimensionType ('height', 'width', 'min')
*/
function createImageThumbnail($fileName, $sourceDir, $targetDir,
$fileNameExtension, $dimension = 60, $dimensionType = 'width')
{
// Set file name, file, extension and target file name
$file = $sourceDir . $fileName;
$pointPos = strrpos($fileName, '.');
$extOrig = substr($fileName, $pointPos + 1);
$ext = strtolower($extOrig);
$targetFileName = substr($fileName, 0, strlen($fileName) -
strlen($ext) - 1) . $fileNameExtension;
// Create new temp image in memory depending on image type
// JPEG
if ($ext == 'jpg' || $ext == 'jpeg')
{
$img = imagecreatefromjpeg($file);
}
// GIF
elseif ($ext == 'gif')
{
$img = imagecreatefromgif($file);
}
// PNG
elseif ($ext == 'png')
{
$img = imagecreatefrompng($file);
}
// None of the above, return false
else {
return false;
}
// Get source dimensions
$sourceWidth = imagesx($img);
$sourceHeight = imagesy($img);
// Determine smaller side if dimension type is 'min'
if ($dimensionType == 'min')
{
// if width is smaller than height
if ($sourceWidth < $sourceHeight)
{
$dimensionType = 'width';
}
else {
$dimensionType = 'height';
}
}
// Calculate dimension
if ($dimensionType == 'width')
{
// Calculate target height relative to supplied target
width
// (Resize bigger so that dirty right hand pixels will
be outside of new image)
$targetWidth = $dimension;
$targetHeight = round(($targetWidth / $sourceWidth) *
$sourceHeight, 0);
}
else {
// Calculate target width relative to supplied target
height
// (Resize bigger so that dirty right hand pixels will
be outside of new image)
$targetHeight = $dimension;
$targetWidth = round(($targetHeight / $sourceHeight) *
$sourceWidth, 0);
}
// set oversize
$overSizePercentage = 1;
$overSizePixelsWidth = round($targetWidth * ($overSizePercentage /
100), 0);
$overSizePixelsHeight = round($targetHeight * ($overSizePercentage /
100), 0);
// Create new-sized target image in memory
// (Height should be smaller so that dirty bottom end pixels will be
outside)
$new_img = imagecreatetruecolor($targetWidth, $targetHeight);
if (!$new_img)
{
// Create new-sized target image in memory
// (Height should be smaller so that dirty bottom end
pixels will be outside)
$new_img = imagecreate($targetWidth, $targetHeight);
imagecopyresized($new_img, $img, 0, 0, 0, 0,
$targetWidth + $overSizePixelsWidth, $targetHeight + $overSizePixelsHeight,
$sourceWidth, $sourceHeight);
}
else {
imagecopyresampled($new_img, $img, 0, 0, 0, 0,
$targetWidth + $overSizePixelsWidth, $targetHeight + $overSizePixelsHeight,
$sourceWidth, $sourceHeight);
}
// Save target image depending on image type
// JPEG
if ($ext == 'jpg' || $ext == 'jpeg')
{
imagejpeg($new_img, $targetDir . $targetFileName .
'.' . $extOrig);
}
// GIF
elseif ($ext == 'gif')
{
imagegif($new_img, $targetDir . $targetFileName .
'.' . $extOrig);
}
// PNG
elseif ($ext == 'png')
{
imagepng($new_img, $targetDir . $targetFileName .
'.' . $extOrig);
}
// Clear memory
imagedestroy($new_img);
imagedestroy($img);
}
Regards, Torsten
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