regex - Backreference before capture group -


i'm trying match text page x of x can identify last page in document.

i've been playing around capture groups, , found regex page (\d*) of \1 works, except matches things such page 2 of 25. ideally, i'd use page \1 of (\d*), guess regex engine doesn't support that.

i should note part of ocr job, can't rely on string endings, since pick characters (page 2 of 25la, example)

anyone have tips?

use \d+ instead of \d*. check end of digit using lookaround well.

page (\d+) of \1(?=\d)

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