如何使用 Perl 去除字符串中的 HTML？
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How can I strip HTML in a string using Perl?
提问by ParoX
Is there anyway easier than this to strip HTML from a string using Perl?
有没有比这更容易使用 Perl 从字符串中去除 HTML 的方法？
$Error_Msg =~ s|<b>||ig;
$Error_Msg =~ s|</b>||ig;
$Error_Msg =~ s|<h1>||ig;
$Error_Msg =~ s|</h1>||ig;
$Error_Msg =~ s|<br>||ig;
I would appreicate both a slimmed down regular expression, e.g. something like this:
我会欣赏一个精简的正则表达式，例如这样的东西：
$Error_Msg =~ s|</?[b|h1|br]>||ig;
Is there an existing Perl function that strips any/all HTML from a string, even though I only need bolds, h1 headers and br stripped?
是否有现有的 Perl 函数可以从字符串中去除任何/所有 HTML，即使我只需要粗体、h1 标题和 br 去除？
回答by Abhinav Gupta
Assuming the code is valid HTML (no stray < or > operators)
假设代码是有效的 HTML（没有杂散的 < 或 > 运算符）
$htmlCode =~ s|<.+?>||g;
If you need to remove only bolds, h1's and br's
如果您只需要删除粗体、h1 和 br
$htmlCode =~ s#</?(?:b|h1|br)\b.*?>##g
And you might want to consider the HTML::Stripmodule
你可能想考虑HTML::Strip模块
回答by brian d foy
From perlfaq9: How do I remove HTML from a string?
The most correct way (albeit not the fastest) is to use HTML::Parser from CPAN. Another mostly correct way is to use HTML::FormatText which not only removes HTML but also attempts to do a little simple formatting of the resulting plain text.
最正确的方法（虽然不是最快的）是使用 CPAN 中的 HTML::Parser。另一种最正确的方法是使用 HTML::FormatText ，它不仅删除 HTML，而且还尝试对生成的纯文本进行一些简单的格式化。
Many folks attempt a simple-minded regular expression approach, like s/<.*?>//g, but that fails in many cases because the tags may continue over line breaks, they may contain quoted angle-brackets, or HTML comment may be present. Plus, folks forget to convert entities--like < for example.
许多人尝试使用简单的正则表达式方法，例如 s/<.*?>//g，但在很多情况下都失败了，因为标签可能会在换行符处继续，它们可能包含带引号的尖括号，或者 HTML 注释可能出席。另外，人们忘记转换实体——例如 <。
Here's one "simple-minded" approach, that works for most files:
这是一种“简单”的方法，适用于大多数文件：
#!/usr/bin/perl -p0777
s/<(?:[^>'"]*|(['"]).*?)*>//gs
If you want a more complete solution, see the 3-stage striphtml program in http://www.cpan.org/authors/id/T/TO/TOMC/scripts/striphtml.gz.
如果您想要更完整的解决方案，请参阅http://www.cpan.org/authors/id/T/TO/TOMC/scripts/striphtml.gz 中的 3-stage striphtml 程序。
Here are some tricky cases that you should think about when picking a solution:
以下是您在选择解决方案时应该考虑的一些棘手案例：
<IMG SRC = "foo.gif" ALT = "A > B">
<IMG SRC = "foo.gif"
ALT = "A > B">
<!-- <A comment> -->
<script>if (a<b && a>c)</script>
<# Just data #>
<![INCLUDE CDATA [ >>>>>>>>>>>> ]]>
If HTML comments include other tags, those solutions would also break on text like this:
如果 HTML 注释包含其他标签，这些解决方案也会在文本上中断，如下所示：
<!-- This section commented out.
<B>You can't see me!</B>
-->
回答by Juan A. Navarro
You should definitely have a look at the HTML::Restrictwhich allows you to strip away or restrict the HTML tags allowed. A minimal example that strips away all HTML tags:
你绝对应该看看HTML::Restrict允许你剥离或限制允许的 HTML 标签。剥离所有 HTML 标签的最小示例：
use HTML::Restrict;
my $hr = HTML::Restrict->new();
my $processed = $hr->process('<b>i am bold</b>'); # returns 'i am bold'
I would recommend to stay away from HTML::Strip because it breaks utf8 encoding.
我建议远离 HTML::Strip 因为它破坏了 utf8 encoding。
