如何用新行替换所有XHTML/HTML换行符(< br>)? [英] How to replace all XHTML/HTML line breaks (<br>) with new lines?

问题描述

我正在寻找最好的br2nl功能.我想用换行符\n替换<br> 和<br /> 的所有实例.与 nl2br()函数非常相似，而相反.

I am looking for the best br2nl function. I would like to replace all instances of <br> and <br /> with newlines \n. Much like the nl2br() function but the opposite.

我知道PHP手册注释中有几种解决方案，但是我正在寻找SO社区对可能解决方案的反馈.

I know there are several solutions in the PHP manual comments but I'm looking for feedback from the SO community on possible solutions.

推荐答案

我通常会说"不要使用正则表达式来处理HTML "，但是在这一点上，我可能会去使用正则表达式时，考虑到<br>标签通常看起来像这样:

I would generally say "don't use regex to work with HTML", but, on this one, I would probably go with a regex, considering that <br> tags generally look like either :

• <br>
• 或<br/>，在/
之前具有任意数量的空格

• <br>
• or <br/>, with any number of spaces before the /

我想像这样的东西可以解决问题:

I suppose something like this would do the trick :

$html = 'this <br>is<br/>some<br />text <br    />!';
$nl = preg_replace('#<br\s*/?>#i', "\n", $html);
echo $nl;

笔记夫妇:

• 以<br
开头
• 后跟任意数量的白色字符:\s*
• 可选地，一个/:/?
• 最后是一个>
• ，并且使用不区分大小写的匹配项(#i)，因为<BR>在HTML中有效

• starts with <br
• followed by any number of white characters : \s*
• optionnaly, a / : /?
• and, finally, a >
• and this using a case-insensitive match (#i), as <BR> would be valid in HTML

这篇关于如何用新行替换所有XHTML/HTML换行符(< br>)?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！