PHP Post_Max_Size VS Upload_Max_Filesize, What Is the Difference

PHP post_max_size vs upload_max_filesize, what is the difference?

You are correct. post_max_size is the maximum size for all POST body data. It doesn't matter if you're POSTing JSON or your DVD collection, this is all POST body data. Your file upload counts towards this limit. You should also be aware that if you are uploading multiple files, the total file size has to fit within this limit.

upload_max_filesize is a maximum size only for files that are POSTed. Other types of POST body data are not subject to this limit.

In short, if you want to upload large files, you must increase both limits.

difference between upload_max_size and upload_max_filesize

Yes ini_set("upload_max_size") function exist in wordpress. for example:

@ini_set( 'upload_max_size' , '64M' ); using in functions.php file link is HERE

In php.ini -> upload_max_filesize is using.

Finally htaccess syntax is php_value upload_max_filesize

Relationship between php’s memory_limit, upload_max_filesize and post_max_filesize

PHP will accept uploaded files that are individually smaller than upload_max_filesize and together take less than post_max_size bytes. The PHP documentation is wrong with regard to memory_limit which does not need to hold the file contents posted.

The following configuration works with both Apache2 module and CGI, and accepts files smaller than 1G.

 upload_max_filesize = 1G
post_max_size = 1G
memory_limit = 32M

PHP upload_max_filesize & post_max_size issue

You are correct. Uploaded data is ignored, when the size limit is exceeded. So, you don't get access to the ['size'] info.

Instead, you need to validate your upload like this:

<?php

if ($_FILES['uploadedFile']['error'] == UPLOAD_ERR_OK)
{
// success - move uploaded file and process stuff here
}
else
{
// error
switch ($_FILES['uploadedFile']['error'])
{
case UPLOAD_ERR_INI_SIZE:
echo "The uploaded file exceeds the upload_max_filesize directive in php.ini."; break;

case UPLOAD_ERR_FORM_SIZE:
echo "The uploaded file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form."; break;

case UPLOAD_ERR_PARTIAL:
echo "The uploaded file was only partially uploaded. "; break;

// etc... see the full list here http://uk1.php.net/manual/en/features.file-upload.errors.php
}
}

PHP post_max_size and upload_max_filesize don't change after edit

you have to do this :

service php-fpm restart

There any limit to the values you can set for post_max_size or upload_max_filesize?

PHP's pretty crappy when it comes to large file uploads, particularly because you have to a memory limit higher than the size of the file. As well, Apache on 32bit systems tends to have a 2gig file limit itself, so even if PHP could handle the upload, Apache will choke.

Change the maximum upload file size

You need to set the value of upload_max_filesize and post_max_size in your php.ini :

; Maximum allowed size for uploaded files.
upload_max_filesize = 40M

; Must be greater than or equal to upload_max_filesize
post_max_size = 40M

After modifying php.ini file(s), you need to restart your HTTP server to use the new configuration.

If you can't change your php.ini, you're out of luck. You cannot change these values at run-time; uploads of file larger than the value specified in php.ini will have failed by the time execution reaches your call to ini_set.

See the Description of core php.ini directives.

PHP - Maximum Total Upload Size?

Yes. There are (as far as I can remember) three or so configuration settings which will affect upload size restrictions:

  • upload_max_filesize, which sets an upper limit on the size of uploaded files
  • post_max_size, which limits the total size of posted data, including file data
  • max_input_time, which restricts the length of time the script is allowed to process input data, including posted values

upload_max_filesize is a limit on each individual file; however, post_max_size is an upper limit on the entire request, which includes all the uploaded files.

Different hosting environments will have these values set differently, which may affect your abilities upon deployment.



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