pdf upload form strange problem

[hey_happy]

Hi Guys

First sorry for my bad english.

 

I have a strange problem with php upload form.

 

When i click on submit button ( with uploaded pdf ) nothing happens.

The pdf file is 17MB, but with smaller PDF the form works perfectly.

 

Here is the form code:

 

<form id="pdf" name="pdf" method="post" action="" target="_self" enctype="multipart/form-data" >
<p align ="center">
        <input type="hidden" name="app_id" value="<?php print $app_id?>">
        <input type="hidden" name="MAX_FILE_SIZE" value="1000000000000">
        <input type="file" name="file1" value="Upload PDF" device="files" accept="text/pdf" />
        <input type="submit" name="sent" value="Send" />
</p>
</form>

 

at the beginning of the upload.php i have the following lines:

 

$sent = isset($_POST['sent']) ? $_POST['sent'] : false; 

 

When i debug $sent and $_POST i saw that they are empty  : (

 

With smaller PDF works perfectly but now with 17MB pdf $sent is empty,the result from print_r($_POST) is Array()

 

in php.ini i changed MAX UPLOAD to 20MB  and then restarted my apache , but i think this doesn't matter.

 

This problem is very strange : )

 

Thanks in advance:)