WP_Terms_List_Table::prepare_items() WordPress Method

	public function prepare_items() {
		$taxonomy = $this->screen->taxonomy;

		$tags_per_page = $this->get_items_per_page( "edit_{$taxonomy}_per_page" );

		if ( 'post_tag' === $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' === $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(
			'taxonomy'   => $taxonomy,
			'search'     => $search,
			'page'       => $this->get_pagenum(),
			'number'     => $tags_per_page,
			'hide_empty' => 0,
		);

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

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

		$args['offset'] = ( $args['page'] - 1 ) * $args['number'];

		// Save the values because 'number' and 'offset' can be subsequently overridden.
		$this->callback_args = $args;

		if ( is_taxonomy_hierarchical( $taxonomy ) && ! isset( $args['orderby'] ) ) {
			// We'll need the full set of terms then.
			$args['number'] = 0;
			$args['offset'] = $args['number'];
		}

		$this->items = get_terms( $args );

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