Use the regular expression method in PHP to delete the width and height styles of HTML-PHP Tutorial-php.cn

Use the regular expression method in PHP to delete the width and height styles of HTML

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Release： 2023-03-14 19:18:01

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This article mainly introduces the method of PHP regular deletion of width and height styles in HTML code, involving PHP's regular matching, replacement and other operation skills for HTML code. Friends in need can refer to the following

Examples of this article This is a regular PHP method to delete width and height styles in HTML code. Share it with everyone for your reference, the details are as follows:

Due to work needs, it is necessary to collect html and save the html content into the database. In order to avoid affecting usage, the width and height styles need to be deleted. For example, width, height, etc. in pictures and p.

However, in the collected HTML, the styles are written in different ways, such as upper and lower case, spaces in the middle, etc.

So I wrote the following method using PHP regular to filter these weird styles.

The code is as follows:

<?php
/**
 * 清除宽高样式
 * @param String $content 内容
 * @return String
 */
function clear_wh($content){
  $config = array(&#39;width&#39;, &#39;height&#39;);
  foreach($config as $v){
    $content = preg_replace(&#39;/&#39;.$v.&#39;\s*=\s*\d+\s*/i&#39;, &#39;&#39;, $content);
    $content = preg_replace(&#39;/&#39;.$v.&#39;\s*=\s*.+?["\&#39;]/i&#39;, &#39;&#39;, $content);
    $content = preg_replace(&#39;/&#39;.$v.&#39;\s*:\s*\d+\s*px\s*;?/i&#39;, &#39;&#39;, $content);
  }
  return $content;
}
?>

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Demo:

<?php
$html = <<<HTML
<p style="text-align:center" width="500" height="300">
  <p style="Width : 100px ; Height: 100 px;">
    <img src="/images/test.jpg" width=400 height = 200>
    <p style="float:left; width: 100px; height : 200 px;"></p>
  </p>
  <p style="width :  100 px ;height: 100px">
    <img src="/images/test.jpg" width=400 height = 200>
  </p>
</p>
HTML;
echo &#39;<xmp>&#39;;
echo &#39;原内容：&#39;.PHP_EOL;
echo $html.PHP_EOL.PHP_EOL;
echo &#39;过滤后内容：&#39;.PHP_EOL;
echo clear_wh($html);
echo &#39;</xmp>&#39;;
?>

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Output:

原内容：
<p style="text-align:center" width="500" height="300">
  <p style="Width : 100px ; Height: 100 px;">
    <img src="/images/test.jpg" width=400 height = 200>
    <p style="float:left; width: 100px; height : 200 px;"></p>
  </p>
  <p style="width :  100 px ;height: 100px">
    <img src="/images/test.jpg" width=400 height = 200>
  </p>
</p>

过滤后内容：
<p style="text-align:center" >
  <p style=" ">
    <img src="/images/test.jpg" >
    <p style="float:left; "></p>
  </p>
  <p style="">
    <img src="/images/test.jpg" >
  </p>
</p>

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