如何从html代码中删除所有样式类，从字符串中删除选择性html标记

Question

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如何从html代码中删除所有样式类，并从字符串中删除选择性html标记就像我不想删除<p>,<a>,<b>

$output = preg_replace('/(<[^>]+) style=".*?"/i', '$1', $output);
$output = preg_replace('/(<[^>]+) class=".*?"/i', '$1', $output);
$answer = preg_replace('/(<[^>]+) id=".*?"/i', '$1', $output);

我找到了这种删除样式和类的方法，但它似乎很糟糕

Answer 1

要删除样式，请使用此regex-$output = preg_replace('/(<[^>]+) style=("|').*?("|')/i','$1',$output);

要删除类，请使用此regex-$output = preg_replace('/(<[^>]+) class=("|').*?("|')/i','$1',$output);

删除除白名单之外的所有标签-$output = strip_tags($output, '<p><a><b><i><table><tr><td><ul><ol><li><hr><h1><h2><h3><pre><caption><br><span><img>')

另请参阅此处从HTML标签中删除样式属性