> What 'multipart'=>true is userfull for?
> what does it mean?

Normal form tags end up looking something like this in the final html code:

<form action="/module/action" method="post">

That form tag is fine in all cases except when the form contains a file upload. The default "content type" for a form is "application/x-www-form-urlencoded", which basically describes the protocol through which the data is uploaded. This is not sufficient for file uploads - because it is "inefficient for sending large quantities of binary data or text containing non-ASCII characters".

The solution is to pass the "multipart" parameter to the symfony function form_tag. This transforms the final html code to the following:

<form action="/module/action" method="post" enctype="multipart/form-data">

This tells the browser to use the multipart/form-data method to submit this form, which is the method necessary when uploading files. "The content type "multipart/form-data" should be used for submitting forms that contain files, non-ASCII data, and binary data."

Reference: http://www.w3.org/TR/html4/interact/forms.html#h-17.13.4.2

documented on: 28 November 2007, weaverryan

I'm doing image upload using the admin generator. I've just noticed that the upload will olny work up to image file size = 2048983, or a somewhere over, but files sized >=2391454 will failed to be uploaded, despite that everything else are the same. Details at http://www.symfony-project.org/forum/index.php?t=msg&th=10040

Do you think the 'multipart'=>true is the reason and cure?

Hmm, no, the admin generator has it on already…

Good question

The multipart will NOT help you in this case, because the Symfony admin generator is smart enough to automatically set your form to use the multipart flag when you have an admin form that includes a file upload.

In other words, you're already using the multipart flag in the admin without knowing it!

But, I'm 99% sure what your problem is. Your php max file size is almost definitely set to 2MB, which equals 2097152 bytes. When you try to upload a file that is bigger than your php upload limit, it won't throw any noticeable errors, it just won't upload the file.

If your run phpinfo() in a script, look for the variable called upload_max_filesize to verify. I bet it's set to 2M. If this is your own localserver, you'll need to find your php.ini file and change this line:

upload_max_filesize = 2M

to something more like this:

upload_max_filesize = 8M

documented on: 29 November 2007, weaverryan

> I bet it's set to 2M.

Exactly!!!

$ grep upload_max_filesize /etc/php.ini
upload_max_filesize = 2M

thanks for the swift reply/solution!!!

documented on: 2007.11.29

I've hit another ceiling:

Now my upload_max_filesize is set to 20M:

$ grep upload_max_filesize /etc/php.ini
upload_max_filesize = 20M

the phpinfo() reports so as well.

However, I found that I was able to upload file of 8,271,573 bytes in size, but not of 9,321,959 bytes in size.

where is this yet another ceiling coming from?

sfxpt

weaverryan wrote:

> check PHP's 'post_max_size' setting it's probably at 8 meg

Thanks A LOT Ryan!!!

You have always been fast and right to the point!

JFTA, to raise the 'post_max_size' to pass over 8M, I have to raise the memory_limit from 60M to 90M as well, because I got the "Allowed memory exhausted" error.

-memory_limit = 60M
+memory_limit = 90M

documented on: 2008.04.11, sfxpt