$Filename = full path and filename of original file
$Thumbnail = full path and filename of thumbnail
$WIDTH && $HEIGHT = specified for resizing
Gdlib must be installed.
<?php
function Resize($Filename,$Thumbnail,$WIDTH,$HEIGHT){
$image = $Filename;
$thumbnail = $Thumbnail;
$imagesize = getimagesize($image);
$fwidth = $imagesize[0];
$fheight = $imagesize[1];
if($fheight <= $fwidth){
$percentage = round(($WIDTH/$fwidth) * 100);
$newwidth = round(($fwidth * $percentage)/100);
$newheight = round(($fheight * $percentage)/100);
}
elseif($fheight > $fwidth){
$percentage = round(($HEIGHT/$fheight) * 100);
$newwidth = round(($fwidth * $percentage)/100);
$newheight = round(($fheight * $percentage)/100);
}
else{
$percentage = round(($fwidth/$WIDTH) * 100);
$newwidth = round(($fwidth * $percentage)/100);
$newheight = round(($fheight * $percentage)/100);
}
$destImage = imagecreatetruecolor($newwidth,$newheight) or
die($file.' - '.$newwidth.':'.$newheight);
$type = strtolower(substr($Filename,-3));
switch($type){
case 'gif':
$srcImage = ImageCreateFromGif($image);
ImageCopyResized($destImage, $srcImage, 0,
0, 0, 0, $newwidth, $newheight, imagesx($srcImage), imagesy($srcImage));
ImageGif($destImage,$thumbnail);
break;
case 'jpg':
$srcImage = ImageCreateFromJPEG($image);
ImageCopyResized($destImage, $srcImage, 0,
0, 0, 0, $newwidth, $newheight, imagesx($srcImage), imagesy($srcImage));
ImageJPEG($destImage,$thumbnail);
break;
case 'png':
$srcImage = ImageCreateFromPNG($image);
ImageCopyResized($destImage, $srcImage, 0,
0, 0, 0, $newwidth, $newheight, imagesx($srcImage), imagesy($srcImage));
ImagePNG($destImage,$thumbnail);
break;
}
//free the memory used for the images
ImageDestroy($srcImage);
ImageDestroy($destImage);
if(file_exists($thumbnail)){
return true;
}
else{
return false;
}
}?>
-----Original Message-----
From: Mark Abrams [mailto:[EMAIL PROTECTED]
Sent: 12 June 2007 03:39 PM
To: [email protected]
Subject: [PHP-WIN] Dynamic image resizing on upload
Is there a PHP function to resize a user's JPG or GIF image during an
upload?
I was advised to use Image Magick http://www.imagemagick.org However, the
Windows install doc has not been written. I have unsuccessfully struggled
with the install for days ...
All I want to do is to resize a large image to a thumbnail of my dimensions
when my end user uploads a an image.
TIA for any help.
--
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