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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
View Developer Edit
 [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.
 
Thank you for the report, and for helping us make PHP better.
 
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