Bug #53728 [NEW]: Recursive Reference or Repetition Don't Works

From: Operating system: Ubuntu 11.04 PHP version: 5.3SVN-2011-01-12 (SVN) Package: PCRE related Bug Type: Bug Bug description:Recursive Reference or Repetition Don't Works Description: ------------ PCRE 8.02 2010-03-19 I use the code below to validate domain names according to RFC 1034 3.5 http://www.rfc-editor.org/rfc/rfc1034.txt This rules is: <domain> ::=<subdomain> | " " <subdomain> ::=<label> |<subdomain> "."<label> <label> ::=<letter> [ [<ldh-str> ]<let-dig> ] <ldh-str> ::=<let-dig-hyp> |<let-dig-hyp> <ldh-str> <let-dig-hyp> ::=<let-dig> | "-" <let-dig> ::=<letter> |<digit> <letter> ::= any one of the 52 alphabetic characters A through Z in upper case and a through z in lower case <digit> ::= any one of the ten digits 0 through 9 I've checked my pattern many times, and guess there may something wrong with PCRE. Test script: --------------- $domain = 'www.WalkinRaven.name'; $result = \preg_match ( '/^ (?P<label> (?P<letter>[a-z]) | # One-letter domain name (?P>letter) (?P<let_dig>[a-z 0-9]) | # Two-letters domain name (?P>letter) (?P<ldh_str>[a-z 0-9 \-]){1,61} (?P>let_dig) # More-letters domain name ) (\. (?P>label))*+ # More labels \.? # Root domain name $/Dix', $domain ); echo $result; Expected result: ---------------- 1 Actual result: -------------- 0 -- Edit bug report at http://bugs.php.net/bug.php?id=53728&edit=1 -- Try a snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=53728&r=trysnapshot52 Try a snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=53728&r=trysnapshot53 Try a snapshot (trunk): http://bugs.php.net/fix.php?id=53728&r=trysnapshottrunk Fixed in SVN: http://bugs.php.net/fix.php?id=53728&r=fixed Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=53728&r=needdocs Fixed in release: http://bugs.php.net/fix.php?id=53728&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=53728&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=53728&r=needscript Try newer version: http://bugs.php.net/fix.php?id=53728&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=53728&r=support Expected behavior: http://bugs.php.net/fix.php?id=53728&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=53728&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=53728&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=53728&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=53728&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=53728&r=dst IIS Stability: http://bugs.php.net/fix.php?id=53728&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=53728&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=53728&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=53728&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=53728&r=mysqlcfg