WP_Terms_List_Table::prepare_items()

	public function prepare_items() {
		$tags_per_page = $this->get_items_per_page( 'edit_' . $this->screen->taxonomy . '_per_page' );

		if ( 'post_tag' === $this->screen->taxonomy ) {
			/**
			 * Filters the number of terms displayed per page for the Tags list table.
			 *
			 * @since WP-2.8.0
			 *
			 * @param int $tags_per_page Number of tags to be displayed. Default 20.
			 */
			$tags_per_page = apply_filters( 'edit_tags_per_page', $tags_per_page );

			/**
			 * Filters the number of terms displayed per page for the Tags list table.
			 *
			 * @since WP-2.7.0
			 * @deprecated WP-2.8.0 Use edit_tags_per_page instead.
			 *
			 * @param int $tags_per_page Number of tags to be displayed. Default 20.
			 */
			$tags_per_page = apply_filters( 'tagsperpage', $tags_per_page );
		} elseif ( 'category' === $this->screen->taxonomy ) {
			/**
			 * Filters the number of terms displayed per page for the Categories list table.
			 *
			 * @since WP-2.8.0
			 *
			 * @param int $tags_per_page Number of categories to be displayed. Default 20.
			 */
			$tags_per_page = apply_filters( 'edit_categories_per_page', $tags_per_page );
		}

		$search = !empty( $_REQUEST['s'] ) ? trim( wp_unslash( $_REQUEST['s'] ) ) : '';

		$args = array(
			'search' => $search,
			'page' => $this->get_pagenum(),
			'number' => $tags_per_page,
		);

		if ( !empty( $_REQUEST['orderby'] ) )
			$args['orderby'] = trim( wp_unslash( $_REQUEST['orderby'] ) );

		if ( !empty( $_REQUEST['order'] ) )
			$args['order'] = trim( wp_unslash( $_REQUEST['order'] ) );

		$this->callback_args = $args;

		$this->set_pagination_args( array(
			'total_items' => wp_count_terms( $this->screen->taxonomy, compact( 'search' ) ),
			'per_page' => $tags_per_page,
		) );
	}