note 26403 added to pcre.pattern.syntax

From: Date: Tue, 29 Oct 2002 22:12:50 +0000
Subject: note 26403 added to pcre.pattern.syntax
Groups: php.notes 
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Having problems with "?" wiping out (invalidating) your match? This proved invalid for me... "Because it [?] has two uses, it can sometimes appear doubled, as in \d??\d which matches one digit by preference, but can match two if that is the only way the rest of the pattern matches." Here's how: "(?:.*fax\s(.*)•)" would match this "fax 212-966-5349 •", but this wouldn't match it: "(?:.*fax\s(.*)•)?". The "?" was supposed to let either 0 or 1 matches get caught, but only this would let that happen: "(?:.*fax\s(.*)•)??". Go figure. Sometimes "??" is better than "?"! -- http://www.php.net/manual/en/pcre.pattern.syntax.php http://master.php.net/manage/user-notes.php?action=edit+26403 http://master.php.net/manage/user-notes.php?action=delete+26403 http://master.php.net/manage/user-notes.php?action=reject+26403

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