Yii2 implements the code for 'previous page, next page' in the page-PHP Tutorial-php.cn

Yii2 implements the code for 'previous page, next page' in the page

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Release： 2023-04-01 11:42:01

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This article mainly introduces the code of yii2 to implement "previous page, next page" in the page. It has a certain reference value. Now I share it with everyone. Friends in need can refer to it

On many pages, you need to add the previous article and next article buttons. The content is quite good. Now I will share it with you and give it as a reference.

I recently made a short answer article details page. I need to add the previous article and next article buttons at the bottom of the page. After analysis, the most basic need is the title and id of the article (as parameters).

The first thing I thought about was adding or subtracting 1 to the current id, but considering that it would be wrong if part of the id was lost, I queried records larger and smaller than the current id respectively and limited them to one, so I came up with the following code.

The code is as follows, please tell me if it is wrong.

In the controller

//查询上-篇文章
    $prev_article = 你的模型::find()
      ->andFilterWhere([&#39;<&#39;, &#39;id&#39;, $id])
      ->andFilterWhere([其他条件)
      ->orderBy([&#39;id&#39; => SORT_DESC])
      ->limit(1)
      ->one();
    //查询下-篇文章
    $next_article = 你的模型::find()
      ->andFilterWhere([&#39;>&#39;, &#39;id&#39;, $id])
      ->andFilterWhere(其他条件)
      ->orderBy([&#39;id&#39; => SORT_ASC])
      ->limit(1)
      ->one();


    $model[&#39;prev_article&#39;] = [
      &#39;url&#39; => !is_null($prev_article) ? Url::current([&#39;id&#39;=>$prev_article->id]) : &#39;javascript:;&#39;,
      &#39;title&#39; => !is_null($prev_article) ? $prev_article->title : &#39;没有了&#39;,
    ];

    $model[&#39;next_article&#39;] = [
      &#39;url&#39; => !is_null($next_article) ? Url::current([&#39;id&#39;=>$next_article->id]) : &#39;javascript:;&#39;,
      &#39;title&#39; => !is_null($next_article) ? $next_article->title : &#39;没有了&#39;,
    ];

    return $this->render(&#39;view&#39;, 
      &#39;model&#39; => $model, 
    );

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In view

<p class="left">
    <p>上一篇:
      <a href="<?=$model[&#39;prev_article&#39;][&#39;url&#39;]?>">
        <?=$model[&#39;prev_article&#39;][&#39;title&#39;]?>
      </a>
    </p>
  </p>
  <p class="right">
    <p>下一篇:
      <a href="<?=$model[&#39;next_article&#39;][&#39;url&#39;]?>">
        <?=$model[&#39;next_article&#39;][&#39;title&#39;]?>
      </a>
    </p>
  </p>

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