PHP Upload Form, "Notice: Undefined index: upload"

Question

hi everone. I searched around google and stackoverflow, but didnt quite find the right answer.

im using a form. Within this form i have a simple uploader

<form method="post" action="uploadImage.php" enctype="multipart/form-data">
   <input name="upload" id="upload" type="file" />
   <input name="add" type="submit" id="add" value="add">
</form>

Now, in my uploadImage.php file, i have written, below

print "<pre>";
print_r($_FILES['upload']);
print "</pre>";

when i upload a image with filesize about below 1.5MB, an array with info of that file is returned. But when i upload a file with about 2MB size, i get 1 error, and no filesize. when i upload a 8MB file i get this error, Notice: Undefined index: upload in C:\Program Files........\uploadImage.php on line 2

I think the problem has something to do with upload limitations, the question is how can i fix this?

Answer 1

php.ini has directives that control max upload size, specifically post_max_size and upload_max_filesize, the latter of which defaults to 2M. Look here.

Answer 2

In php.ini you need to edit the line upload_max_filesize to a higher value. 2MB is the default limit.

Answer 3

create a .htaccess file in your root folder and put the following code in it.

php_value upload_max_filesize 20M
php_value post_max_size 20M
php_value max_execution_time 200
php_value max_input_time 200

Answer 4

That first error is because you hit upload_max_filesize limit, and that another notice comes when you hit post_max_size.

post_max_size generally should be set to a higher value than upload_max_filesize since there is some extra overhead/bytes involved.