Regex Problem


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Regex Problem

by ido50 (Scribe)

on Aug 25, 2003 at 09:42 UTC ( [id://286336]=perlquestion: print w/replies, xml )

Need Help??

ido50 has asked for the wisdom of the Perl Monks concerning the following question:

Hi!
One of my programs uses a simple regex to match a string in a text file. The string is inside an html tag so the regex is something like m/^<[^>]+>$string<\/[^>]+>$/. Anyway the regex always works unless the string contains some parentheses. For example: "Hi there" would match, "Hi there (Mark)" wouldn't.
What can I do?
P.S. Might be worth mentioning the strings are all hebrew.

Thanks...

-------------------------
Live fat, die young

Comment on Regex Problem Download Code

Replies are listed 'Best First'.
Re: Regex Problem by liz (Monsignor) on Aug 25, 2003 at 10:00 UTC
quotemeta is your friend. `m/^<[^>]+>\Q$string\E<\/[^>]+>$/` [download] Liz	[reply] [d/l]
Re: Regex Problem by CombatSquirrel (Hermit) on Aug 25, 2003 at 10:26 UTC
Adding to liz' (completely correct) comment: The parens are RegEx metacharachters used for grouping and capturing. For example, `$string = 'Hi there (Mark)'; m/^<[^>]+>$string<\/[^>]+>$/;` would be exactly the same as `m/^<[^>]+>Hi there (Mark)<\/[^>]+>$/;`, which matches "Hi there Mark" between tags and captures the "Mark" part of it. `quotemeta(...)` and its RegEx equivalent `m/\Q...\E/` (quote ... end) escape all the RegEx metacharachters properly (i.e. `(Mark)` to `$Mark$`). And that's about it. Hope this helped. CombatSquirrel.	[reply] [d/l] [select]
Re: Regex Problem by ido50 (Scribe) on Aug 25, 2003 at 10:46 UTC
thanks guys.. ------------------------- Live fat, die young	[reply]

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