PHP框架Laravel插件Pagination实现自定义分页

Laravel 的分页很方便，其实扩展起来也挺容易的，下面就来做个示例，扩展一下 paginate() 和 simplePaginate() 方法，来实现我们自定义分页样式，比如显示 "上一页" 和 "下一页" ，而不是 "《" 和 "》" ，当然扩展的方法掌握了你就可以肆无忌惮的扩展一个你想要的分页了，比如跳转到某一页，分页显示一共多少记录，当前显示的记录范围等等巴拉巴拉的。。。

5.1和5.2应该是同样的方法，我这里用的是5.2的版本。文档告诉我们 Paginator 对应于查询语句构造器和 Eloquent 的  simplePaginate 方法，而  LengthAwarePaginator 则等同于  paginate 方法。那我们还是来看下源码，具体这个  paginate 是如何实现 render() 的,

Illuminate/Pagination/LengthAwarePaginator.php

<?phpnamespace Illuminate/Pagination;......class LengthAwarePaginator extends AbstractPaginator implements Arrayable, ArrayAccess, Countable, IteratorAggregate, JsonSerializable, Jsonable, LengthAwarePaginatorContract {......  public function render(Presenter $presenter = null)  {    if (is_null($presenter) && static::$presenterResolver) {      $presenter = call_user_func(static::$presenterResolver, $this);    }    $presenter = $presenter ?: new BootstrapThreePresenter($this);    return $presenter->render();  }......}

render() 中传入的是一个 Presenter 的实例，并调用这个实例化的 render 方法来实现分页的显示的。如果没有则调用 BootstrapThreePresenter 中 render() 的，来看看 BootstrapThreePresenter 是干嘛的

Illuminate/Pagination/BootstrapThreePresenter.php

<?phpnamespace Illuminate/Pagination;use Illuminate/Support/HtmlString; use Illuminate/Contracts/Pagination/Paginator as PaginatorContract; use Illuminate/Contracts/Pagination/Presenter as PresenterContract;class BootstrapThreePresenter implements PresenterContract {  use BootstrapThreeNextPreviousButtonRendererTrait, UrlWindowPresenterTrait;  /**   * The paginator implementation.   *   * @var /Illuminate/Contracts/Pagination/Paginator   */  protected $paginator;  /**   * The URL window data structure.   *   * @var array   */  protected $window;  /**   * Create a new Bootstrap presenter instance.   *   * @param /Illuminate/Contracts/Pagination/Paginator $paginator   * @param /Illuminate/Pagination/UrlWindow|null $window   * @return void   */  public function __construct(PaginatorContract $paginator, UrlWindow $window = null)  {    $this->paginator = $paginator;    $this->window = is_null($window) ? UrlWindow::make($paginator) : $window->get();  }  /**   * Determine if the underlying paginator being presented has pages to show.   *   * @return bool   */  public function hasPages()  {    return $this->paginator->hasPages();  }  /**   * Convert the URL window into Bootstrap HTML.   *   * @return /Illuminate/Support/HtmlString   */  public function render()  {    if ($this->hasPages()) {      return new HtmlString(sprintf(        '<ul class="pagination">%s %s %s</ul>',        $this->getPreviousButton(),        $this->getLinks(),        $this->getNextButton()      ));    }    return '';  }......}