如何删除多余的< br/>使用PHP从HTML代码中获取标签? [英] How to remove redundant <br /> tags from HTML code using PHP?

问题描述

我正在用PHP解析一些凌乱的HTML代码，其中有一些多余的
标记，我想对其进行一些清理.例如:

I'm parsing some messy HTML code with PHP in which there are some redundant
tags and I would like to clean them up a bit. For instance:

<br>

<br /><br /> 


<br>

我该如何使用preg_replace()替换类似的内容?:

How would I replace something like that with this using preg_replace()?:

<br /><br />

换行符，空格以及< br> ，< br/> 和< br/> 必须全部考虑.

Newlines, spaces, and the differences between <br>, <br/>, and <br /> would all have to be accounted for.

基本上，我想将三个或三个以上连续休息的每个实例替换为两个.

推荐答案

这里是您可以使用的东西.只要有2个或更多< br> 标记(空格之间以及不同类型之间)，第一行就会找到，并用格式正确的< br/>< br/>替换它们..

Here is something you can use. The first line finds whenever there is 2 or more <br> tags (with whitespace between and different types) and replace them with wellformated <br /><br />.

如果您也想要的话，我还添加了第二行来清理< br> 标记的其余部分.

I also included the second line to clean up the rest of the <br> tags if you want that too.

function clean($txt)
{
    $txt=preg_replace("{(<br[\\s]*(>|\/>)\s*){2,}}i", "<br /><br />", $txt);
    $txt=preg_replace("{(<br[\\s]*(>|\/>)\s*)}i", "<br />", $txt);
    return $txt;
}

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