title: PHP $_POST / $_FILES empty when upload larger than POST_MAX_SIZE
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/6190713/how-to-detect-if-a-user-uploaded-a-file-larger-than-post-max-size">How to detect if a user uploaded a file larger than post_max_size?</a>  </p>
  </blockquote>
  
  
  
  <p>I'm writing a script that handles file uploads from a web application. I've got a set limit on the size of files that may be uploaded to my application (storage space limitations). I'm currently trying to put some validation code in that will check to make sure the user actually uploaded a file, so that I can display a nice error message to them. But I'd also like to be able to display an error message to the user if they've uploaded a file that's too big. I can use Javascript for this, but I'd like a PHP check as well in case they don't have Javascript enabled.</p>
  
  <p>I've set my POST_MAX_SIZE var in PHP.ini to be the maximum file upload size, but this has produced an unexpected issue. If someone tries to upload a file larger than the POST_MAX_SIZE, the binary data just gets truncated at the max size, and the $_FILES array doesn't contain an entry for that file. This is the same behavior that would occur if the user didn't submit a file at all.</p>
  
  <p>This makes it difficult to tell why the $_FILES array doesn't contain a file, i.e. whether it wasn't ever uploaded, or whether it was too big to send completely.</p>
  
  <p>Is there a way to distinguish between these two cases? In other words, is there a way to tell whether POST data was sent for a file, but was truncated prematurely before the entire file was sent?</p>