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Posted by Erwin Moller on 09/05/07 16:07
xx75vulcan wrote:
> Ok I feel like a dope!
>
> I didn't realize that editing a picture, even simply rotating it could
> increase it's file size.
> Upped the upload_max_filesize in php.ini and the hidden form field
> max_file_size value and it works great.
>
Good.
> Thanks a million for that neat debugging trick!
Yes, print_r() is very handy during debuggingsession.
Whenever you are in trouble, just print_r() whatever it is you don't
understand. Often helps.
(Even used it on my girlfriend, but I didn't understand the output.)
Regards,
Erwin Moller
>
> Chris
>
>
> On Sep 5, 10:50 am, xx75vulcan <xx75vul...@gmail.com> wrote:
>> Thanks Erwin, I feel I'm a little closer.
>>
>> Deployed your trick, and below is what I get for edited files:
>>
>> Array
>> (
>> [imagefile] => Array
>> (
>> [name] => DSC00064.JPG
>> [type] =>
>> [tmp_name] =>
>> [error] => 2
>> [size] => 0
>> )
>>
>> )
>>
>> This is what I get for un-edited files:
>>
>> Array
>> (
>> [imagefile] => Array
>> (
>> [name] => 2_site_top.jpg
>> [type] => image/jpeg
>> [tmp_name] => C:\WINDOWS\TEMP\php59.tmp
>> [error] => 0
>> [size] => 32448
>> )
>>
>> )
>>
>> On Sep 5, 10:14 am, Erwin Moller
>>
>> <Since_humans_read_this_I_am_spammed_too_m...@spamyourself.com> wrote:
>>> xx75vulcan wrote:
>>>> Hi,
>>>> I've got a PHP Upload Form that works great, unless that is, the image
>>>> your uploading has been modified through a photo editing software.
>>>> Example: if I upload the image straight from a camera or other, it
>>>> uploads fine. However, If I want to rotate the image, or resize it
>>>> with photoshop or simmilar, making sure to save it again as a jpg, the
>>>> PHP upload won't upload the image.
>>>> It's like editing the image somehow changes it's mime type or
>>>> something?!
>>> Hi Vulcan,
>>> Maybe.
>>>> Any ideas?
>>> I ALWAYS start debugging such issues with:
>>> echo "<pre>";
>>> print_r($_FILES);
>>> echo "</pre>";
>>> exit;
>>> Then compare the output of your uneditted and editted version.
>>> Do you see any differences?
>>> That will probably give you a hint.
>>> And do NOT rely too much on mimetype.
>>> from php.net:
>>> $_FILES['userfile']['type']
>>> The mime type of the file, if the browser provided this
>>> information. An example would be "image/gif". This mime type is however
>>> not checked on the PHP side and therefore don't take its value for granted.
>>> Hope that helps.
>>> Regards,
>>> Erwin Moller
>>>> Here's my upload script:
>>>> <?php
>>>> if($_POST["upload"]) //Check to see if submit was clicked
>>>> {
>>>> // Get the details of "imagefile"
>>>> $filename = $_FILES['imagefile']['name'];
>>>> $temporary_name = $_FILES['imagefile']['tmp_name'];
>>>> $mimetype = $_FILES['imagefile']['type'];
>>>> $filesize = $_FILES['imagefile']['size'];
>>>> //Open the image using the imagecreatefrom..() command based on the
>>>> MIME type.
>>>> switch($mimetype) {
>>>> case "image/jpg":
>>>> case "image/jpeg":
>>>> case "image/pjpeg":
>>>> $i = imagecreatefromjpeg($temporary_name);
>>>> break;
>>>> case "image/gif":
>>>> $i = imagecreatefromgif($temporary_name);
>>>> break;
>>>> case "image/png":
>>>> $i = imagecreatefrompng($temporary_name);
>>>> break;
>>>> }
>>>> //Delete the uploaded file
>>>> unlink($temporary_name);
>>>> //Specify the size of the thumbnail
>>>> $dest_x = 350;
>>>> $dest_y = 350;
>>>> //Is the original bigger than the thumbnail dimensions?
>>>> if (imagesx($i) > $dest_x or imagesy($i) > $dest_y) {
>>>> //Is the width of the original bigger than the height?
>>>> if (imagesx($i) >= imagesy($i)) {
>>>> $thumb_x = $dest_x;
>>>> $thumb_y = imagesy($i)*($dest_x/imagesx($i));
>>>> } else {
>>>> $thumb_x = imagesx($i)*($dest_y/imagesy($i));
>>>> $thumb_y = $dest_y;
>>>> }
>>>> } else {
>>>> //Using the original dimensions
>>>> $thumb_x = imagesx($i);
>>>> $thumb_y = imagesy($i);
>>>> }
>>>> //Generate a new image at the size of the thumbnail
>>>> $thumb = imagecreatetruecolor($thumb_x,$thumb_y);
>>>> //Copy the original image data to it using resampling
>>>> imagecopyresampled($thumb, $i ,0, 0, 0, 0, $thumb_x, $thumb_y,
>>>> imagesx($i), imagesy($i));
>>>> //Save the thumbnail
>>>> imagejpeg($thumb, "../images/$filename", 80);
>>>> //Display FileName
>>>> Print "Value for Image field: $filename";
>>>> $added =true;
>>>> }
>>>> ?>
>>>> <html>
>>>> <form action="upload.php" method="POST" enctype="multipart/
>>>> form-data">
>>>> <input type="hidden" name="MAX_FILE_SIZE" value="200000">
>>>> <input type="file" name="imagefile">
>>>> <input type="submit" name="upload" value="Upload Image">
>>>> </form>
>>>> </html>
>
>
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