Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>On <strong>MAX_FILE_SIZE</strong></p> <p>Read This:</p> <p>...At <a href="http://pk.php.net/manual/en/features.file-upload.post-method.php" rel="noreferrer">http://pk.php.net/manual/en/features.file-upload.post-method.php</a> and equivalent locations in other formats, it is stated that browsers take the value of a MAX_FILE_SIZE form field into account.</p> <p><strong>This information</strong> is repeated elsewhere on the web and in books, but appears to originate from the PHP documentation (it <strong>does not appear in terms of other server-side technologies</strong>).</p> <p><strong>There is nothing in any of the HTML, HTTP or related specs to indicate that this is the case (in particular RFC 1867 which introduced file uploads to HTML doesn't mention it</strong>, so it isn't even a case of a kludge that was mentioned in the first RFC and then dropped) nor does it make sense in the context of the HTML specs (there is nothing to indicate any relationship between that particular hidden input and the file input). The only statements about hidden fields I could find in any of them was warnings in the security considerations sections against user-agents basing any file-related operations on anything mentioned in a hidden field.</p> <p><strong>No browsers appear to perform this as an "extension"</strong>. Indeed given that there are potentially other possible meanings for a hidden field with that name in an application handling several file uploads, it would have to be considered a design flaw any any did.</p> <p>I submit that there is no such mechanism in mainstream browsers (if any at all) and indeed shouldn't be. Reference to it should be dropped from documentation.</p> <p>I'd further suggest that since this idea has propagated from this documentation elsewhere that a note about it not working should to be added.</p> <p>If a mechanism is required or desired for more rapidly handling this sort of file handling issue then it requires functionality to allow PHP to intercept streams being uploaded before request completion, which would be completely different to how this documentation suggest it should be dealt with, even if it was true...</p> <blockquote> <ul> <li><a href="http://www.juangiordana.com.ar/blog/2007/12/08/max_file_size-erroneo/" rel="noreferrer">http://www.juangiordana.com.ar/blog/2007/12/08/max_file_size-erroneo/</a></li> </ul> </blockquote> <hr> <p>the code below come from swfUpload php implementation:</p> <pre><code>// Check post_max_size (http://us3.php.net/manual/en/features.file-upload.php#73762) $POST_MAX_SIZE = ini_get('post_max_size'); $unit = strtoupper(substr($POST_MAX_SIZE, -1)); $multiplier = ($unit == 'M' ? 1048576 : ($unit == 'K' ? 1024 : ($unit == 'G' ? 1073741824 : 1))); if ((int)$_SERVER['CONTENT_LENGTH'] &gt; $multiplier*(int)$POST_MAX_SIZE &amp;&amp; $POST_MAX_SIZE) { header("HTTP/1.1 500 Internal Server Error"); echo "POST exceeded maximum allowed size."; exit(0); } // Validate the file size (Warning the largest files supported by this code is 2GB) $max_file_size_in_bytes = 2147483647; $file_size = @filesize($_FILES[$upload_name]["tmp_name"]); if (!$file_size || $file_size &gt; $max_file_size_in_bytes) { HandleError("File exceeds the maximum allowed size"); exit(0); } </code></pre>
    singulars
    1. This table or related slice is empty.
    1. PODetecting file upload size on the client side?
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USRonnie Depp
    1. USLuca Filosofi
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PODetecting file upload size on the client side?
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTDownMod
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. CO+1; good investigation.
      singulars
      1. PO
      1. USstrager
    2. CO`you need to verify the file uploaded was less than MAX_FILE_SIZE using PHP` no, you don't. Just get rid of this useless field
      singulars
      1. PO
      1. USYour Common Sense
    3. CO"requires functionality to allow PHP to intercept streams being uploaded before request completion" -> PHP can intercept request if its length exceeds the limit specified in `post_max_size`, but it requires browser to sent request header containing `Content-Length`, and from modern browsers only Opera seems to be sending this header.
      singulars
      1. PO
      1. USdev-null-dweller
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload