Regular cut BBCode

Question

Regular cut BBCode

I need a regex to strip any BBCode in a string. I have the following (and an array with tags):

new RegExp('\\[' + tags[index] + '](.*?)\\[/' + tags[index] + ']');

It selects [tag] this [/ tag] just fine, but doesn't work when using [url = http://google.com] this [/ url] .

What do I need to change? Many thanks.

0

javascript regex bbcode

Oskar rough May 11 '09 at 12:48

a source to share

8 answers

Daniel Brückner · Answer 1 · 2009-05-11T12:59:28+0000

You must allow any character other than ']' after the tag until you find ']'.

new RegExp('\\[' + tags[index] + '[^]]*](.*?)\\[/' + tags[index] + ']');

You can simplify this to the following expression.

\[[^]]*]([^[]*)\[\\[^]]*]

The problem is that it will fit [WrongTag]stuff[\WrongTag]

. Matching nested tags requires multiple use of the expression.

Tomalak · Answer 2 · 2009-05-11T13:01:07+0000

To cut any BBCode, use something like:

string alltags = tags.Join("|");
RegExp stripbb = new RegExp('\\[/?(' + alltags + ')[^]]*\\]');

Replace the globally empty string. No additional loop is required.

rampion · Answer 3 · 2009-05-11T13:44:34+0000

You can check balanced tags with a backlink:

 new RegExp('\\[(' + tags.Join('|') + ')[^]]*](.*?)\\[/\\1]');

The real problem is that you cannot match arbitrary nested tags in a regex (this is the limit of the regex). Some languages allow recursive regular expressions, but these are extensions (which technically make them irregular, but don't change the name most people use for objects).

If you don't like balanced tags, you can simply remove any tag you find:

 new RegExp('\\[/?(?:' + tags.Join('|') + ')[^]]*]');

JonusC · Answer 4 · 2009-09-27T14:47:12+0000

I stumbled upon this thread and found it helpful to help me on the right track, but here I ended up spending two hours building (this is my first RegEx!) For JavaScript and tested it working very well for crazy nests and even incorrectly nested strings. it just works !:

string = string.replace(/\[\/?(?:b|i|u|url|quote|code|img|color|size)*?.*?\]/img, '');

If line = "[b] [color = blue] [url = www.google.com] Google [/ url] [/ color] [/ b]", then the new line will be "Google". Amazing.

Hope someone finds this useful, it was the best match for "JavaScript RegEx strip BBCode" on Google;)

Coder · Answer 5 · 2012-07-25T15:26:47+0000

I had a similar problem - in PHP not Javascript - I had to strip the BBCode [quote] tags as well as the quotes in the tags. Added a problem that there is often arbitrary additional material in the [quote] tag, eg.[quote:7e3af94210="username"]

This worked for me:

$post = preg_replace('/[\r\n]+/', "\n", $post);
$post = preg_replace('/\[\s*quote.*\][^[]*\[\s*\/quote.*\]/im', '', $post);
$post = trim($post);

lines 1 and 3 are only intended to strip out any extra newlines and any remaining from the regex.

rudolfson · Answer 6 · 2009-05-11T12:59:38+0000

I think,

new RegExp('\\[' + tags[index] + '(=[^\\]]+)?](.*?)\\[/' + tags[index] + ']');

should do it. Instead of group 1, you must select group 2.

Bart kiers · Answer 7 · 2009-09-27T14:51:45+0000

Remember that many (most?) Default regex flavors do not allow DOT string matching with metacharacter. Calling a type tag

"[foo]dsdfs
fdsfsd[/foo]"

... Include DOTALL by adding "(? S)" to your regex, or by replacing DOT meta char in your regex with the character class [\ S \ s] .

Manu · Answer 8 · 2013-03-04T13:41:50+0000

this worked for me, for every tag name. it also supports strings like [url = "blablabla"] [/ url] '

str = str.replace(/\[([a-z]+)(\=[\w\d\.\,\\\/\"\'\#\,\-]*)*( *[a-z0-9]+\=.+)*\](.*?)\[\/\1\]/gi, "$4")

Regular cut BBCode

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