Codeigniter psd和ai mime类型不起作用

i have visited some related question and try that step but still getting error when uploading file using codeigniter
The filetype you are attempting to upload is not allowed when trying to upload psd or ai files.. i have try something like that for allowed files type

$config['allowed_types'] = 'psd|ai|gif|jpg|png|xlsx|xls|pdf|doc|docx';

i looked at config/mimes.php there value of psd is

'psd'   =>  'application/x-photoshop',

and my browser sends filetype 'application/octet-stream' i changed mimes.php

'psd'   =>  array('application/x-photoshop','application/octet-stream'),

but still same error
The filetype you are attempting to upload is not allowed

please help me

Try this for psd files

'psd'   =>  array('application/x-photoshop','application/octet-stream','image/vnd.adobe.photoshop'),

Extended psd extension

Change this(application/config/mimes.php)

'psd'    =>    'application/x-photoshop',

to this
Method 01 (uploading psd file)

'psd'    =>    array('image/photoshop', 'image/x-photoshop', 'image/psd', 'application/photoshop', 'application/psd', 'zz-application/zz-winassoc-psd'),

Or this
Method 02 (uploading cdr and psd files)

'psd'    =>    array('application/x-photoshop','application/octet-stream'),
'cdr'   =>      array('application/octet-stream','application/x-zip-compressed','image/x-coreldraw'),