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