mimetypes.php

array('Extension', false, 'jpeg,jpg,png,gif,doc,docx,odt,ppt,pptx,odp,xls,xlsx,ods,pdf'),
array('MimeType', false, array('image/gif',
'image/jpeg',
'image/png',
'application/msword',
'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
'application/vnd.oasis.opendocument.text',
'application/vnd.ms-powerpoint',
'application/vnd.openxmlformats-officedocument.presentationml.presentation',
'application/vnd.oasis.opendocument.presentation',
'application/vnd.ms-excel',
'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
'application/vnd.oasis.opendocument.spreadsheet',
'application/pdf'))