PHP uses regular expressions to remove width and height styles-PHP Tutorial-php.cn

PHP uses regular expressions to remove width and height styles

jacklove

Release： 2023-04-01 12:26:02

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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 differently, 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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