Quick Tip: Enhance WordPress Media Manager with Additional Media Type Filters

By default, the WordPress Media Manager only allows you to filter media by three types; images, video, and audio.

The website I am currently developing will use a lot of PDF attachments, so I would like to add PDF filtering functionality to the media manager.

I discovered that additional file type filtering can be added to the media manager using a simple filter hook.

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Example; Add PDF

To achieve this we will use the "post_mime_types" filter.

In our function, we will use the mime type slug to select the file type, the slug for PDF is 'application/pdf'

Then we define an array containing the text labels of the file types.

function modify_post_mime_types( $post_mime_types ) {

	// select the mime type, here: 'application/pdf'
	// then we define an array with the label values

	$post_mime_types['application/pdf'] = array( __( 'PDFs' ), __( 'Manage PDFs' ), _n_noop( 'PDF <span class="count">(%s)</span>', 'PDFs <span class="count">(%s)</span>' ) );

	// then we return the $post_mime_types variable
	return $post_mime_types;

}

// Add Filter Hook
add_filter( 'post_mime_types', 'modify_post_mime_types' );

That's it! The option to filter PDF files will now appear in your media manager (as long as you have at least one PDF in your media library)

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Other file types

You can do this on any file supported by WordPress. Supported file types are defined by WordPress in wp-includes/functions.php

The default supported file types are defined in the get_allowed_mime_types() function.

To find the slug for the file type you are looking for, just search for "get_allowed_mime_types()" in wp-includes/functions.php

The number of file types supported by WordPress is quite extensive, so I won’t list them all, but here’s a small example:

	'pdf' => 'application/pdf',
	'swf' => 'application/x-shockwave-flash',
	'mov|qt' => 'video/quicktime',
	'flv' => 'video/x-flv',
	'js' => 'application/javascript',
	'avi' => 'video/avi',
	'divx' => 'video/divx',

As you can see, the slug for the Flash .swf file will be "application/x-shockwave-flash".

Do you have any suggestions regarding file types in WordPress Media Manager? Share them in the comments below!

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