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Bug #17957 Empty backreferences broken
Submitted: 2002-06-24 18:08 UTC Modified: 2002-09-24 11:42 UTC
From: john at scl dot co dot uk Assigned:
Status: Closed Package: Regexps related
PHP Version: 4.3.0-dev OS: Linux 2.2.19
Private report: No CVE-ID: None
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From: john at scl dot co dot uk
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 [2002-06-24 18:08 UTC] john at scl dot co dot uk 
<?

echo ereg_replace("^(a*)",'\1','a')."\n";
echo ereg_replace("^(a*)",'\1','b')."\n";

echo ereg_replace("^(a)*",'\1','a')."\n";
echo ereg_replace("^(a)*",'\1','b')."\n";

?>

produces:
a
b
a
\1b

should produce:
a
b
a
b

'./configure' '--with-apxs=/usr/sbin/apxs' '--with-config-file-path=/usr/lib' '--with-curl'
'--with-pdflib=shared' '--with-mcrypt' '--with-pcre' '--with-dom' '--with-pear' '--with-xml=shared' '--with-zlib-dir=/usr' '--prefix=/usr' '--enable-debug=no' '--enable-safe-mode' '--with-exec-dir=/usr/bin' '--with-mysql=/usr' '--with-regex=system'

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AllCommentsChangesGit/SVN commitsRelated reports
 [2002-06-25 07:02 UTC] sander@php.net 
Can you try the latest snapshot from http://snaps.php.net, I think this has been fixed.
 [2002-07-09 06:34 UTC] john at scl dot co dot uk 
Tried it with 4.3.0-dev downloaded from CVS this morning
and result is same. (Not sure if this is same as 
http://snaps.php.net?)
 [2002-07-09 08:04 UTC] sniper@php.net 
reproduced.
 [2002-09-24 11:42 UTC] iliaa@php.net 
This bug has been fixed in CVS.

In case this was a PHP problem, snapshots of the sources are packaged
every three hours; this change will be in the next snapshot. You can
grab the snapshot at http://snaps.php.net/.
 
In case this was a documentation problem, the fix will show up soon at
http://www.php.net/manual/.

In case this was a PHP.net website problem, the change will show
up on the PHP.net site and on the mirror sites in short time.
 
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