Regex that extracts text between tags, but not the tags

问题

I want to write a regex which extract the content that is between two tags <title> in a string but not the tags. IE I have the following

<title>My work</title>
<p>This is my work.</p> <p>Learning regex.</p>

The regex

(<title>)(.*?)(<\/title>)

extracts <title>My work</title> but I want to extract only My work. How can I do that? This is a link to the example http://regex101.com/r/mD8fB0

回答1:

You can use this following Regex:

>([^<]*)<

or, >[^<]*<

Then eliminate unwanted characters like '<' & '>'

回答2:

the best way is to use Assertions, for your case, the regex would be:

(?<=\<title\>).*?(?=\<\/title\>)

for more details have a look here

回答3:

In your case, you could just use the second backreference from the regex, which would hold the text you are interested in.

Since you mention preg_match in your tags, I am assuming you want this for PHP.

$matches = array();
$pattern = '#<title>(.*?)</title>#'; // note I changed the pattern a bit
preg_match($pattern, $string, $matches);
$title = $matches[1];

Note that this is actually the first back reference in my patterns, since I've omitted the parentheses around the tags themselves, which were not needed.

Typically, you should not use Regex to parse HTML documents, but I think this might be one of those exception cases, where it is not so bad, since the title tag should only exist once on the page.

回答4:

I used this as a replace function of Regex: (<.+?>)

来源：https://stackoverflow.com/questions/15033905/regex-that-extracts-text-between-tags-but-not-the-tags