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File Advanced

The file advanced field uses the WordPress media popup for selecting / uploading files. You can also reorder files if you want.



Besides the common settings, this field has the following specific settings, the keys are for use with code:

Max number of filesmax_file_uploadsMax number of uploaded files. Optional.
Force deleteforce_deleteWhether or not delete the files from Media Library when deleting them from post meta. true or false (default). Optional. Note: it might affect other posts if you use the same file for multiple posts.
MIME typesmime_typeMIME type of files which we want to show in the Media Library. Note: this is a filter for items in the media popup, it doesn't restrict file types when uploading.
Show statusmax_statusDisplay how many files uploaded/remaining. Applied only when "Max number of files" is defined. true (default) or false. Optional.

This is a sample field settings array when creating this field with code:

'id' => 'file',
'name' => 'File Advanced',
'type' => 'file_advanced',
'force_delete' => false,
'max_file_uploads' => 2,
'mime_type' => 'application,audio,video',
'max_status' => false,


This field saves multiple attachment IDs in the database. Each value (attachment ID) is stored in a single row in the database with the same meta key (similar to what add_post_meta does with the last parameter false).

Template usage

Displaying uploaded files with links:

<?php $files = rwmb_meta( 'my_field_id' ); ?>
<h3>Uploaded files</h3>
<?php foreach ( $files as $file ) : ?>
<li><a href="<?= $file['url']; ?>"><?= $file['name']; ?></a></li>
<?php endforeach ?>

or simpler:

<h3>Uploaded files</h3>
<?php rwmb_the_value( 'my_field_id' ) ?>

rwmb_the_value() outputs files in an unordered list, while rwmb_meta() returns an array of files, each file has the following information:

'ID' => 123,
'name' => 'intro.txt',
'path' => '/var/www/wp-content/uploads/intro.txt',
'url' => '',
'title' => 'Introduction',

Displaying only one file:

<?php $files = rwmb_meta( 'my_field_id', ['limit' => 1] ) ?>
<?php $file = reset( $files ) ?>
<a class="button" href="<?= $file['url'] ?>">Download file</a>


This field has some filters to change the texts displayed on the screen..

rwmb_media_add_string+ Add MediaAdd new file string
rwmb_media_single_files_stringfileSingular "file" string
rwmb_media_multiple_files_stringfilesPlural "files" string
rwmb_media_remove_stringRemoveFile remove string
rwmb_media_edit_stringEditFile edit string
rwmb_media_view_stringViewFile view string

The code below changes the "+ Add Media" string:

add_filter( 'rwmb_media_add_string', function () {
return '+ New File';
} );