Ross escreveu:
....................
$image = imagecreatefromjpeg($img_url);
$image in this case, is the Image Identifier, and returns something like
, Resource id #NUMBER ( Resourse id allocation process, for the generic
imagecreate... ).
if ($image === false) { die ('Unable to open image'); }
// Get original width and height
echo $width = imagesx($image);
echo $height = imagesy($image);
// New width and height
$new_width = 200;
$new_height = 150;
// Resample
$image_resized = imagecreatetruecolor($new_width, $new_height);
$image_resized is another Image Identifier
imagecopyresampled($image_resized, $image, 0, 0, 0, 0, $new_width,
$new_height, $width, $height);
The imagecopyressampled() returns a boolean value [ TRUE(1) or FALSE(0)].
This value can be used to test the function success.
A) If you haven't no problem with readers, you must use:
> // Display resized image
> header('Content-type: image/jpeg');
> imagejpeg($image_resized);
imagedestroy($image);
imagedestroy($image_resized);
So, in this case you have 2 Image Identifiers, to be destroyd at the
end, to freely the processes.
imagedestroy($image);
imagedestroy($image_resized);
B) However, if you have problems with header, you must use:
imagejpeg ($image_resized, "image.jpg");
echo '<img src="image.jpg" border="0" alt="image.jpg" title="image" />';
imagedestroy($image);
imagedestroy($image_resized);
instead of
>
> // Display resized image
> header('Content-type: image/jpeg');
> imagejpeg($image_resized);
imagedestroy($image);
imagedestroy($image_resized);
die();
This is not allowed here.
-----------
Please see an example of imagecopyressampled() here:
http://www.educar.pro.br/en/a/gdlib/index.php?pn=20&tr=97
--
zerof
http://www.educar.pro.br/
Apache - PHP - MySQL - Boolean Logics - Project Management
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