# 分页（Pagination） The process of pagination takes place when we need to present big groups of arbitrary data gradually.`Phalcon\Paginator`offers a fast and convenient way to split these sets of data into browsable pages. ## 数据适配器（Data Adapters） This component makes use of adapters to encapsulate different sources of data: | Adapter | Description | | --- | --- | | [Phalcon\\Paginator\\Adapter\\NativeArray](http://docs.iphalcon.cn/api/Phalcon_Paginator_Adapter_NativeArray.html) | Use a PHP array as source data | | [Phalcon\\Paginator\\Adapter\\Model](http://docs.iphalcon.cn/api/Phalcon_Paginator_Adapter_Model.html) | Use a[Phalcon\\Mvc\\Model\\Resultset](http://docs.iphalcon.cn/api/Phalcon_Mvc_Model_Resultset.html)object as source data. Since PDO doesn’t support scrollable cursors this adapter shouldn’t be used to paginate a large number of records | | [Phalcon\\Paginator\\Adapter\\QueryBuilder](http://docs.iphalcon.cn/api/Phalcon_Paginator_Adapter_QueryBuilder.html) | Use a[Phalcon\\Mvc\\Model\\Query\\Builder](http://docs.iphalcon.cn/api/Phalcon_Mvc_Model_Query_Builder.html)object as source data | ## 示例（Examples） In the example below, the paginator will use the result of a query from a model as its source data, and limit the displayed data to 10 records per page: ~~~ <?php use Phalcon\Paginator\Adapter\Model as PaginatorModel; // Current page to show // In a controller/component this can be: // $this->request->getQuery("page", "int"); // GET // $this->request->getPost("page", "int"); // POST $currentPage = (int) $_GET["page"]; // The data set to paginate $robots = Robots::find(); // Create a Model paginator, show 10 rows by page starting from $currentPage $paginator = new PaginatorModel( [ "data" => $robots, "limit" => 10, "page" => $currentPage, ] ); // Get the paginated results $page = $paginator->getPaginate(); ~~~ The`$currentPage`variable controls the page to be displayed. The`$paginator->getPaginate()`returns a`$page`object that contains the paginated data. It can be used for generating the pagination: ~~~ <table> <tr> <th>Id</th> <th>Name</th> <th>Type</th> </tr> <?php foreach ($page->items as $item) { ?> <tr> <td><?php echo $item->id; ?></td> <td><?php echo $item->name; ?></td> <td><?php echo $item->type; ?></td> </tr> <?php } ?> </table> ~~~ The`$page`object also contains navigation data: ~~~ <a href="/robots/search">First</a> <a href="/robots/search?page=<?= $page->before; ?>">Previous</a> <a href="/robots/search?page=<?= $page->next; ?>">Next</a> <a href="/robots/search?page=<?= $page->last; ?>">Last</a> <?php echo "You are in page ", $page->current, " of ", $page->total_pages; ?> ~~~ ## 适配器使用（Adapters Usage） An example of the source data that must be used for each adapter: ~~~ <?php use Phalcon\Paginator\Adapter\Model as PaginatorModel; use Phalcon\Paginator\Adapter\NativeArray as PaginatorArray; use Phalcon\Paginator\Adapter\QueryBuilder as PaginatorQueryBuilder; // Passing a resultset as data $paginator = new PaginatorModel( [ "data" => Products::find(), "limit" => 10, "page" => $currentPage, ] ); // Passing an array as data $paginator = new PaginatorArray( [ "data" => [ ["id" => 1, "name" => "Artichoke"], ["id" => 2, "name" => "Carrots"], ["id" => 3, "name" => "Beet"], ["id" => 4, "name" => "Lettuce"], ["id" => 5, "name" => ""], ], "limit" => 2, "page" => $currentPage, ] ); // Passing a QueryBuilder as data $builder = $this->modelsManager->createBuilder() ->columns("id, name") ->from("Robots") ->orderBy("name"); $paginator = new PaginatorQueryBuilder( [ "builder" => $builder, "limit" => 20, "page" => 1, ] ); ~~~ ## 页面属性（Page Attributes） The`$page`object has the following attributes: | Attribute | Description | | --- | --- | | items | The set of records to be displayed at the current page | | current | The current page | | before | The previous page to the current one | | next | The next page to the current one | | last | The last page in the set of records | | total\_pages | The number of pages | | total\_items | The number of items in the source data | ## 自定义适配器（Implementing your own adapters） The[Phalcon\\Paginator\\AdapterInterface](http://docs.iphalcon.cn/api/Phalcon_Paginator_AdapterInterface.html)interface must be implemented in order to create your own paginator adapters or extend the existing ones: ~~~ <?php use Phalcon\Paginator\AdapterInterface as PaginatorInterface; class MyPaginator implements PaginatorInterface { /** * Adapter constructor * * @param array $config */ public function __construct($config); /** * Set the current page number * * @param int $page */ public function setCurrentPage($page); /** * Returns a slice of the resultset to show in the pagination * * @return stdClass */ public function getPaginate(); } ~~~