I just don't get my Regex right:
I have the following template:
<!-- Defines the template for the tabs. -->
{{TMPL:Import=../../../../Data/Templates/Ribbon/tabs.tmpl; Name=Tabs}}
<div class="tabs">
<ul role="tablist">
{{BOS:Sequence}}
<li role="tab" class="{{TabType}}" id="{{tabId}}">
<span>{{TabFile}}</span>
</li>
{{EOS:Sequence}}
</ul>
</div>
{{Render:Tabs}}
I would like to find everything between {{}} except the tags that begins with {{BOS, {{EOS, {{TMPL, {{Render
Here are a couple approaches:
Attempt 1:
({{).*(}})
This selects everything between {{ }} tags, which is not good.
Attempt 2:
({{)[^TMPL][^BOS][^EOS][^Render].*(}})
This will make that {{TabType}} and {{TabFile}} are not selected anymore and I just don't know why.
With some other regex, I get that {{TabType}}" id="{{tabId}} is selected as one match.
Does anyone have a clue on how to solve this, I really need a regex Guru :-)
You can use negative lookahead based regex like this:
{{(?!TMPL|[BE]OS|Render).*?}}
RegEx Demo
You have to use the following regex to get the content between braces:
\{\{(.*?)\}\}
Working Demo
If you want to exclude the content from the comment you posted you can use a regex technique to exclude what you don't want and keep what you want at the end of the regex:
\{\{BOS:Sequence\}\}|\{\{EOS:Sequence\}\}|\{\{TMPL:Import.*?\}\}|\{\{Render:Tabs\}\}|\{\{(.*?)\}\}
Working demo
By the way, if you want to have a shortcut for above regex you can use:
\{\{(?:BOS|EOS):Sequence\}\}|\{\{TMPL:Import.*?\}\}|\{\{Render:Tabs\}\}|\{\{(.*?)\}\}
This is a very useful technique for pattern exclusion that I glad to learn it from Anubhava and zx81 (they rock using regex pattern). For this regex technique you can find the content you need using capturing groups (check the green highlights on the screenshot below):
Using [^TMPL] and the like won't work because these are character classes. You could use a negative lookahead, though (or even lookbehind depending upon the regex library you are using).
\{\{(?!BOS:)(?!EOS:)(?!Render:)(?!TMPL:)(.*?)\}\}
Still I get the feeling that you want the BOS, EOS, etc. to just be strings in the template with {{ and other values to be interpolated. If you are using handlebars or something, you can have strings interpolated:
{{'{{BOS:Sequence}}'}}
Related
I am using notepad++ and I want to create an automation in order to replace some strings.
In this case I am going to deal with the a href tag.
So, I will give 3 examples of some lines I have in my code :
01)
<img src="urlurlurlurl" alt="">
02)
<a href="https://url.com" class="logo"><img src="urlurlurlurl" alt="">
</a>
03)
<img src="urlurlurlurl" alt="">
04)
link
So, if I wanted to replace the full a href tag above in all 4 cases, I would use this one : <a href(.*?)a>
Now, I am trying to think of a way to replace the url within the a href tag only.
I tried using that :
href="(?s)(.*?)"|href ="(?s)(.*?)"
and it works fine because I also take into consideration that there might be a space.
But now in the replace window I have to include href=""
Is there a way to make it search for the a href tags and then replace a specific substring of it?
I want to know because there are cases where I have other tags that include a url and I want to replace it. But a generic replacement for all the strings that are included within quotes ("string") would not be good as I do not to replace all of them.
You can use a negated class to match everything before and after the href like,
(a[^>]*href\s*=\s*")[^"]*
replace with capture group $1REPLACE_STRING
Regex Demo
What it does?
a[^>]* Matches a followed by anything other than a closing >.
href\s*=\s*" Matches href=". Till here is captured in group 1.
[^"]* Matches anything other than ". This form the url that you want to replace.
I'm using a regex to parse some HTML I have the following regex which matches all tags except img and a.
\<(?!img|a)[^\>]+\>
This works well but I also want it to match the closing tags, I've tried the following but it doesn't work:
\</?(?!img|a)[^\>]+\>
What would be the best way to do this?
(Also before there is a plethora of comments saying not to use regexes to parse HTML I'd just like to say that this HTML is generated by a tool and is very uniform.)
EDIT:
<p>So in this</p>
<p>HTML <strong>with nested tags</strong></p>
<p>It should remove <i>everything</i> except This link
and this <img src="#" alt="image" /> but it also needs to kep the textual content</p>
I think that the simplest solution would be the following:
<\/?(?!img|a)[^>]+>
It simply matches:
a <,
a / (escaped with \) if there is any (quantifier ?),
asserts that there is neither img nor a,
a sequence of anything but > ([^>]+) and
a >
See it working here on regex101.
Ok here is a pretty wasteful solution:
<(?!img|a|\/img|\/a)[^>]+>
It would be great if someone could find a better one.
I have some html which I want to grab between 2 tags. However nested tags exist in the html so looking for wouldn't work as it would return on the first nested div.
Basically I want my regex to..
Match some text literally, followed by ANY character upto another literal text string. So my question is how do I get [^<]* to continue matching until it see's the next div.
such as
<div id="test"[^<]*<div id="test2"
Example html
<div id="test" class="whatever">
<div class="wrapper">
<fieldset>Test</fieldset><div class="testclass">some info</div>
</div>
<!-- end test div--></div>
</div>
<div id="test2" class="endFind">
In general, I suspect you want to look at "greedy" vs "lazy" in your regex, assuming that's supported by your platform/language.
For example, <div[^>]*>(.*?)</div> would make $1 match all the text inside a div, but would try to keep it as small as possible. Some people call *? a "lazy star".
But it seems you're looking to find the text within a div that is before the start of the first nested div. That would be something like <div[^>]*>(.*?)<div
Read about greedy vs lazy here and check to make sure that whatever language you're using supports it.
$ php -r '$text="<div>Test<div>foo</div></div>\n"; print preg_replace("/<div[^>]*>(.*?)<div.*/", "\$1", $text);'
Test
$
Regex is not capable of parsing HTML. If this is part of an application, you're doing something wrong. If you absolutely have to parse a document, use a html/xml parser.
If you're trying to screen scrape something and don't want to bother with a parser, look for identifying marks in the page you're scraping. For example, maybe the embedded div ends just before the one you want to match, so you could match </div></div> instead.
Alternatively, here's a regex that meets your requirements. However, it is very fragile: it will break if, for example, #test's children have children, or the html isn't valid, or I missed something, etc, etc ...
/<div id="test"[^<]*(<([^ >]+).+<\/$2>[^<]*)*<\/div>/
I'm very new to PHP writing and regular expressions. I need to write a Regex pattern that will allow me to "grab" the headlines in the following html tags:
<title>My news</title>
<h1>News</h1>
<h2 class=\"yiv1801001177first\">This is my first headline</h2> <p>This is a summary of a fascinating article.</p> <h2>This is another headline</h2> <p>This is a summary of a fascinating article.</p> <h2>This is the third headline</h2> <p>This is a summary of a fascinating article.</p> <h2>This is the last headline</h2> <p>This is a summary of a fascinating article.</p>
So I need a pattern to match all the <h2> tags. This is my first attempt at writing a pattern, and I'm seriously struggling...
/(<h+[2])>(.*?)\<\/h2>/ is what I've attempted. Help is much appreciated!
I'm not too familiar with PHP, but in cases like this it's usually easier to use XML parser (which will automatically detect <h2> as well as <h2 class="whatever"> rather than regex, which you'll have to add a bunch of special cases to. Javascript, for example has XML DOM exactly for this purpose, I'd be surprised if PHP didn't have something similar.
The easiest way to do it via regex is
#<h2\b[^>]*>(.*?)</h2>#is
This will match any h2 tag and capture its contents in backreference $1. I've used # as a regex delimiter to avoid escaping the / later on in the regex, and the is options to make the regex case-insensitive and to allow newlines within the tag's contents.
There are circumstances where this regex will fail, though, as pointed out correctly by others in this thread.
I have only checked in RegexBuddy, there following regex works:
<h2.*</h2>
I have content something like
<div class="c2">
<div class="c3">
<p>...</p>
</div>
</div>
What I want is to match the div.c2's inner HTML. The contents of it may vary a lot. The only problem I am facing here is that how can I make it to work so that the right closing div is taken?
You can't. This problem is unsolvable with classic regular expressions, and with most of the existing regex implementations.
However, some regex engines have special support for balanced pair matching. See, e.g., here (.NET). Though even in this case your regex will be able to parse only a subset of syntactically correct texts (e.g., what if a < /div > is embedded in a comment?). You need an HTML parser to get reliable results.
Any chance this will always be valid XHTML? If so, you'd be better off parsing it as XML than trying to regex this.
Delete the first line, delete the last line. Problem solved. No need for RegEx.
The following pattern works well with .Net RegEx implementation:
\<div class="c2"\>{[\n a-z.<>="0-9/]+}\</div\>
And we replace that with \1.
Input:
<div class="c2">
<div class="c3">
<p>...</p>
</div></div></div></div></div></div></div></div>
</div>
Output:
<div class="c3">
<p>...</p>
</div></div></div></div></div></div></div></div>