oh good god i spent ages on this and ive just seen the error.
add_filter('acf/upload_prefilter/key=field_627a6567e2078', 'field_name_upload_prefilter');
function field_nameupload_prefilter($errors) {
one has a gap in the name …. the other doesnt
And of course it exists its a function name created. Full on developer brain meltdown today
For anyone out there I found the solution. This no longer exists > 'field_name_upload_prefilter'
SO you need to change it to
'gist_acf_upload_dir_prefilter'
I found the solution here > https://gist.github.com/BODA82/a4b810b9c0f17fe4c52f7c7e96ade119
Here is my code Working as of today.
function gist_acf_upload_dir_prefilter($errors, $file, $field) {
// Only allow editors and admins, change capability as you see fit
if( !current_user_can('edit_pages') ) {
$errors[] = 'Only Editors and Administrators may upload attachments';
}
// This filter changes directory just for item being uploaded
add_filter('upload_dir', 'gist_acf_upload_dir');
}
// ACF hook, set to field key of your file upload field
add_filter('acf/upload_prefilter/key=field_627a6567e2078', 'gist_acf_upload_dir_prefilter', 10, 3 );
// Custom upload directory
function gist_acf_upload_dir($param) {
// Set to whatever directory you want the ACF file field to upload to
$custom_dir = '/uploads/protected';
$param['path'] = WP_CONTENT_DIR . $custom_dir;
$param['url'] = WP_CONTENT_URL . $custom_dir;
return $param;
}
Another Update >
[10-May-2022 13:50:24 UTC] PHP Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'field_name_upload_prefilter' not found or invalid function name in public_html/wp-includes/class-wp-hook.php on line 309
I have also tried the following array solution but this didnt work either.
I had the same issue as @dtx211. I solved the problem by passing an array with the filters:
add_filter(‘acf/upload_prefilter/name=my_acf_upload_fieldname’, array( $this, ‘field_name_upload_prefilter’ ) );
AND
add_filter(‘upload_dir’, array( $this, ‘field_name_upload_dir’ ) );
Also ensure, that the upload directory has the right access rights and maybe already exists.
