find all the <1></1> and <2></2> and <3></3>... in a string.
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Before you go too far down this road, please read this question: stackoverflow.com/questions/1732348/…Greg Hewgill– Greg Hewgill2009-12-08 10:18:09 +00:00Commented Dec 8, 2009 at 10:18
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4 Answers
<(\d+)></\1>
should work. This ensures that the regex won't match <1></4> for example.
\1 is here a backreference which must match exactly the same string as the first capturing group (the (\d+) in the first angle brackets).
1 Comment
Joey
Should I? I don't know. But I did. By the way, regular-expressions.info is a great site to learn.
One regex to match any of them?
<([1-3])></\1>
Should there code allow for anything to be posted in between the > and the <? Something like this then:
<([1-3])>(.*?)</\1>
Comments
<STYLE[^>]*>([\s\S]*?)<\/STYLE[^>]*>
Just replace STYLE with your tag like 1, 2 whatever.
Comments
You can use the following regex: <[0-9]></[0-9]>
EDIT: To avoid that the search matches <2></3> too, you can use a sub-expression and a backreference to instantiate it: <([0-9])></\1>
2 Comments
David Hedlund
this would match <1></2> as well, tho
Bruce Dou
but this will also find
<2></3> ...