validators\FileValidator $maxSize

The maximum number of bytes required for the uploaded file. Defaults to null, meaning no limit. Note, the size limit is also affected by upload_max_filesize and post_max_size INI setting and the 'MAX_FILE_SIZE' hidden field value. See getSizeLimit() for details.

See also:

• http://php.net/manual/en/ini.core.php#ini.upload-max-filesize
• http://php.net/post-max-size
• getSizeLimit()
• $tooBig for the customized message for a file that is too big.