From:             [EMAIL PROTECTED]
Operating system: Windows (2000)
PHP version:      4.1.2
PHP Bug Type:     PCRE related
Bug description:  Bad backslash substitution w/ subexpressions

Actually, this is quite simple.
Take this:

$preg_replace("/.\:\\.*?\\(.*?).gif/i","http://xpto/\\1.img",$string);

Theoretically, this would make a simple find-replace, but PHP throws out a
"unmatched parenthesis" error (Compilation failed: unmatched parentheses
at offset 12 blablabla...). With the only parentheses in that regexp being
the "(.*?)" in the middle, the error is awkward.

After some juggling I eventually found that it seems that in the "\\(.*?)"
part of the expression, the backslash before the parenthesis gets replaced
with an actual parenthesis BEFORE the double-backslash is replaced with an
actual backslash. I tried putting a space before the parenthesis and no
error appeared (obviously, the regexp didn't work like that :).
-- 
Edit bug report at http://bugs.php.net/?id=16537&edit=1
-- 
Fixed in CVS:        http://bugs.php.net/fix.php?id=16537&r=fixedcvs
Fixed in release:    http://bugs.php.net/fix.php?id=16537&r=alreadyfixed
Need backtrace:      http://bugs.php.net/fix.php?id=16537&r=needtrace
Try newer version:   http://bugs.php.net/fix.php?id=16537&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=16537&r=support
Expected behavior:   http://bugs.php.net/fix.php?id=16537&r=notwrong
Not enough info:     http://bugs.php.net/fix.php?id=16537&r=notenoughinfo
Submitted twice:     http://bugs.php.net/fix.php?id=16537&r=submittedtwice

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