Forum: upload avatar

[Albion]

Hi, I am working on the Forum chapter and taken note of the various problems associated with php.ini’s and basedir’s. Everything apparently works OK: the browser searches and uploads a jpeg, a thumbnail is made and stored in the file ‘avatars’, and I think I have set the php.ini and basedir to correctly point to the appropriate files. Nevertheless, I still have some niggling errors. I have a link from a page to ‘upload_avatar’; when it is clicked I get the following warnings detailed below. Note: At this point nothing has been submitted. Then, after I hit the submit button everything behaves as expected and there are no more errors. A Google search has been sufficient to understand what the errors mean, but offers no solution. Any suggestions? because the warnings are choking the ‘errorlog’.
[28-Jan-2012 16:39:12] PHP Notice: Undefined index: avatar in E:\xampp\htdocs\public_files\upload_avatar.php on line 20
[28-Jan-2012 16:39:12] PHP Notice: Undefined index: avatar in E:\xampp\htdocs\public_files\upload_avatar.php on line 24
[28-Jan-2012 16:39:12] PHP Warning: getimagesize() [<a href='function.getimagesize'>function.getimagesize </a>]: Filename cannot be empty in E:\xampp\htdocs\lib\JpegThumbnail.php on line 19
[28-Jan-2012 16:39:12] PHP Warning: Division by zero in E:\xampp\htdocs\lib\JpegThumbnail.php on line 22
[28-Jan-2012 16:39:12] PHP Warning: Division by zero in E:\xampp\htdocs\lib\JpegThumbnail.php on line 22
[28-Jan-2012 16:39:12] PHP Warning: imagecreatefromjpeg() [<a href='function.imagecreatefromjpeg'>function.image createfromjpeg</a>]: Filename cannot be empty in E:\xampp\htdocs\lib\JpegThumbnail.php on line 24
[28-Jan-2012 16:39:12] PHP Warning: imagecreatetruecolor() [<a href='function.imagecreatetruecolor'>function.imag ecreatetruecolor</a>]: Invalid image dimensions in E:\xampp\htdocs\lib\JpegThumbnail.php on line 29
[28-Jan-2012 16:39:12] PHP Warning: imagecopyresized() expects parameter 1 to be resource, boolean given in E:\xampp\htdocs\lib\JpegThumbnail.php on line 31
[28-Jan-2012 16:39:12] PHP Warning: imagedestroy() expects parameter 1 to be resource, boolean given in E:\xampp\htdocs\lib\JpegThumbnail.php on line 32
[28-Jan-2012 16:39:12] PHP Warning: imagejpeg() expects parameter 1 to be resource, boolean given in E:\xampp\htdocs\lib\JpegThumbnail.php on line 43
[28-Jan-2012 16:39:12] PHP Warning: imagedestroy() expects parameter 1 to be resource, boolean given in E:\xampp\htdocs\lib\JpegThumbnail.php on line 44

[Albion]

Well, I've just found a solution. In the book and download code, line 21 in upload_avatar.php was set like this:

if (!$_FILES['avatar']['error'])

I have now changed it to this:

if (isset($_FILES['avatar']['error']))

Everything uploads OK with no error notices. However I think something is not quite right because I realise that I have cancelled the warnings by acknowledging that the errors are set!

[Albion]

I have just made the following adjustment. It makes more sense and works OK.

if (isset($_FILES['avatar'])) {

if (!$_FILES['avatar']['error'])
{