How to read uploaded file in chunks using PHP?

[Don]

Hi all,

I need to read an uploaded file into chunks, so I can examine the acculative size between chunks to
determine if a maximum size is being exceeded. I'm currently using the PHP function
"move_uploaded_file()" to move it in one piece. But, I'm finding some clients files are bigger than
I want to allow, and with that function I don't have an opportunity to determine that until the
entire file has been uploaded.

Thanks for any help.
Don

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[Daniel Tryba]

Don <[e-mail]> wrote:

I need to read an uploaded file into chunks, so I can examine the
acculative size between chunks to determine if a maximum size is being
exceeded. I'm currently using the PHP function "move_uploaded_file()"
to move it in one piece. But, I'm finding some clients files are
bigger than I want to allow, and with that function I don't have an
opportunity to determine that until the entire file has been uploaded.

AFAIK this is not possible with PHP (only).

[NC]

Don wrote:

I need to read an uploaded file into chunks, so I can examine
the acculative size between chunks to determine if a maximum
size is being exceeded.

No you don't. To limit the maximum size of an upload, you can simply
set proper values for upload_max_filesize and post_max_size
configuration
directives and check the value of $_FILES['form_field']['error'] after
the upload. If if is equal to UPLOAD_ERR_INI_SIZE constant (or,
numerically, 1), you can delete the file from the temporary directory
and tell the user to control his uploading appetites.

An alternative is to specify a MAX_FILE_SIZE field in the upload form
and compare the value of $_FILES['form_field']['error'] with
UPLOAD_ERR_FORM_SIZE (or 2).

For more information, see:

http://www.php.net/features.file-upload
http://www.php.net/features.file-upload.errors

Cheers,
NC