PHP method to dynamically read data and clear the rightmost margin-PHP Tutorial-php.cn

PHP method to dynamically read data and clear the rightmost margin

墨辰丷

Release： 2023-03-27 18:06:02

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This article mainly introduces the method of dynamically reading data and clearing the rightmost margin in PHP. Interested friends can refer to it. I hope it will be helpful to everyone.

Requirement effect in one row and three columns:

Scenario simulation: A colleague gave me this piece of static code As follows:

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Document</title>
</head>
<style>
  li,ul{padding: 0;margin:0;list-style: none;}
  .box{
    width:1000px;background: #ddd;height:500px;
  }
  .box li{margin:0 50px 20px 0;background:red;height:30px;width:300px;float: left;}
</style>
<body>
  <p class="box">    
    <ul>
      <?php
      for($i=0;$i<9;$i++){
          echo &#39;<li></li>&#39;;
      }
      ?>
    </ul>
  </p>
</body>
</html>

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But the dynamic reading is unified? What should I do if the width is not enough? The wrong line wrapping effect is not what we want!

Solution 1: Style widening and hiding

<style>
  li,ul{padding: 0;margin:0;list-style: none;}
  .box{
    width:1000px;background: #ddd;height:500px;overflow: hidden;
  }
  .box ul{width: 1200px;}
  .box li{margin:0 50px 20px 0;background:red;height:30px;width:300px;float: left;}
</style>

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Preview is normal:

Solution 2: PHP judgment, clear the rightmost column Margin

<p class="box">    
    <ul>
      <?php
      //列数
      $col=3;
      for($i=0;$i<9;$i++){
        $margin_r = (($i%$col)==($col-1))?"margin-right:0;":"";//清除每行最右侧宝贝右边距
          echo &#39;<li style="&#39;.$margin_r.&#39;">&#39;.$i%$col.&#39;</li>&#39;;
      }
      ?>
    </ul>
  </p>

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##Option one and option two are both possible Achieve the same effect!

The above is the entire content of this article, I hope it will be helpful to everyone's study.

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