Bosky, Dave wrote:
> Does anyone have a nice function that will resize an uploaded image to
> specific width/height dimensions?
Not a function, per se, but I use this script:
<?php
$path = $_SERVER['PATH_INFO'];
ereg(".*/target/([0-9]*).*", $path, $target);
$target = isset($target[1]) && $target[1] ? $target[1] : 50;
$path = ereg_replace("/target/[0-9]*", "", $path);
list($junk1, $junk2, $type) = @getimagesize($path);
$type = isset($type) && $type ? $type : IMAGETYPE_JPEG;
switch ($type){
case IMAGETYPE_JPEG: $fullsize = imagecreatefromjpeg($path); break;
case IMAGETYPE_GIF: $fullsize = imagecreatefromgif($path); break;
case IMAGETYPE_PNG: $fullsize = imagecreatefrompng($path); break;
}
$width = imagesx($fullsize);
$height = imagesy($fullsize);
if ($width > $height){
$scale = $target/$width;
}
else{
$scale = $target/$height;
}
if ($scale < 1){
$w = round($scale * $width);
$h = round($scale * $height);
$thumbnail = imagecreatetruecolor($w, $h);
imagecopyresized($thumbnail, $fullsize, 0, 0, 0, 0, $w, $h, $width,
$height);
header("Content-type: image/jpeg");
imagejpeg($thumbnail);
}
else{
imagejpeg($fullsize);
}
?>
So for 50x50 images, I just use:
http://example.com/scale.php/full/path/to/originalfile.jpg
If I want some other size, I just use:
http://example.com/scale.php/target/150/full/path/to/originalfile.jpg
where 150 is the max width/height I want.
> I wanted to find something that would work for only GIF and JPG image
> types.
Looks like I just output a JPEG no matter what the input is -- You'll have
to add another 'switch' statement much like the one near the top to decide
which kind of image to output.
Probably be a good idea to add some error-checking right after the
getimagesize call, and if that failed, just die().
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