cp_media_filters()

function cp_media_filters() {

	// File type filter
	$mime_types = wp_get_mime_types();

	$mime_filter = '';
	if ( ! empty( $mime_types ) ) {
		$mime_filter .= '<label for="filter-by-type" class="screen-reader-text">' . __( 'Filter by type' ) . '</label>';
		$mime_filter .= '<select name="post_mime_type" id="filter-by-type">';
		$mime_filter .= '<option value="">' . __( 'All media items' ) . '</option>';

		$post_mime_types = get_post_mime_types();
		unset( $post_mime_types['trash'] );

		foreach ( $post_mime_types as $mime_type => $label ) {
			$mime_filter .= '<option value="' . esc_attr( $mime_type ) . '"' . selected( 'post_mime_type', $mime_type, false ) . '>' .
				 esc_html( $label[0] ) . '</option>';
		}
		$mime_filter .= '</select>';
	}

	// Delete button
	$delete_button = '<button type="button" class="button media-button button-primary button-large delete-selected-button hidden" disabled>' . esc_html__( 'Delete permanently' ) . '</button>';

	// Months and media category dropdown select boxes
	// Use output buffers to keep the order of the select dropdown boxes
	// consistent with the Media List View
	$list_table = _get_list_table( 'WP_Media_List_Table' );

	ob_start();
	$list_table->months_dropdown( 'attachment' );
	$month_filter = ob_get_clean();

	ob_start();
	$list_table->media_categories_dropdown( 'attachment' );
	$media_cat_filter = ob_get_clean();

	// Bulk select button
	$bulk_button = '<button type="button" class="button media-button button-large select-mode-toggle-button">' . esc_html__( 'Bulk select' ) . '</button>';

	$media_filters = $mime_filter . $delete_button . $month_filter . $media_cat_filter . $bulk_button;

	/**
	 * Filters the dropdown select boxes and buttons available on the Media Library grid page.
	 *
	 * @since CP-2.3.0
	 *
	 * @param  string  $mime_filter       Mime type filter dropdown select box.
	 * @param  string  $delete_button     Button to delete selected items.
	 * @param  string  $month_filter      Month-based filter dropdown select box.
	 * @param  string  $media_cat_filter  Media category filter dropdown select box.
	 * @param  string  $bulk_button       Button to select items in bulk.
	 *
	 * @return string  $media_filters     A string of dropdown select boxes and buttons
	 */
	return apply_filters( 'cp_media_filters', $media_filters, $mime_filter, $delete_button, $month_filter, $media_cat_filter, $bulk_button );
}