In php.ini the following parameters impact file uploads:
- file_uploads
http://www.php.net/manual/en/ini.sect.file_uploads.php#ini.file-uploads - upload_tmp_dir
http://www.php.net/manual/en/ini.sect.file_uploads.php#ini.upload-tmp-dir - upload_max_filesize
http://www.php.net/manual/en/ini.sect.file_uploads.php#ini.upload-max-filesize - post_max_size
http://www.php.net/manual/en/ini.sect.data-handling.php#ini.post-max-size - max_input_time
http://www.php.net/manual/en/ref.info.php#ini.max-input-time - memory_limit
http://www.php.net/manual/en/ini.sect.resource-limits.php#ini.memory-limit
Apache might also impose a limit on the size of file uploads using the LimitBodyRequest directive. See http://httpd.apache.org/docs-2.1/ko/mod/core.html#limitrequestbody for details.