将自动换行应用于 html 内容，不包括 html 属性 [英] Apply wordwrap to html content, excluding html attributes

问题描述

我不习惯正则表达式，所以这对我来说似乎很容易但很棘手.

I'm not used to regular expressions so this might seem easy while tricky for me.

基本上，我将自动换行应用于包含经典 html 标签的内容:、...

Basically, i'm applying wordwrap to content, that contains classic html tags : , ...

  $text = wordwrap($text, $cutLength, " ", $wordCut);
  $text = nl2br(bbcode_parser($text));
  return $text;

如您所见，我的问题非常简单:我只想将 wordwrap() 应用于我的内容，不包括 html 属性中的内容: href 、 src ...

As you can see, my problem is pretty simple : all I want is to apply wordwrap() to my content, excluding what could be in html attributes : href , src ...

有人可以帮我吗?非常感谢！

Could someone help me out ? Thanks a lot !

推荐答案

当然不应该使用正则表达式进行 html 解析，但这应该分开
你想要的内容.我对 php 的了解有限，所以这只是说明程序.

You shouldn't use regex for html parsing of course, but this should separate out
content should you want to. I have limited knowledge of php so this just illustrates procedure.

$tags = 
'  <
   (?:
       /?\w+\s*/?
     | \w+\s+ (?:".*?"|\'.*?\'|[^>]*?)+\s*/?
     | !(?:DOCTYPE.*?|--.*?--)
   )>
';

$scripts =
'   <
   (?:
       (?:script|style) \s*
     | (?:script|style) \s+ (?:".*?"|\'.*?\'|[^>]*?)+\s*
   )>
   .*?
   </(?:script|style)\s*>
';

$regex = / ($scripts | $tags) | ((?:(?!$tags).)+) /xsg;

替换字符串是 Group1 分类到您的返回值自动换行函数(传递内容，Group2 字符串)所以像:replacement = \1.textwrap( \2 )
在 textwrap 内部，您决定如何处理内容.

The replacement string is Group1 catted to the return value of your word wrap function (which is passed the content, Group2 string) so something like: replacement = \1 . textwrap( \2 )
Inside of textwrap you decide what to do with the content.

在 Perl 中测试(顺便说一句，它非常慢并且为了清晰起见被淡化了):

Tested in Perl (btw its very slow and watered down for clarity):

use strict;
use warnings;

my $tags = 
'  <
   (?:
       /?\w+\s*/?
     | \w+\s+ (?:".*?"|\'.*?\'|[^>]*?)+\s*/?
     | !(?:DOCTYPE.*?|--.*?--)
   )>
';

my $scripts =
'   <
   (?:
       (?:script|style) \s*
     | (?:script|style) \s+ (?:".*?"|\'.*?\'|[^>]*?)+\s*
   )>
   .*?
   </(?:script|style)\s*>
';

my $html = join '', <DATA>;

while ( $html =~ / ($scripts | $tags) | ((?:(?!$tags).)+) /xsg ) {
    if (defined $2 && $2 !~ /^\s+$/) {
        print $2,"\n";
    }
}

这篇关于将自动换行应用于 html 内容，不包括 html 属性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！