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Bug #7257 RegEx kills String
Submitted: 2000-10-16 15:29 UTC Modified: 2000-10-23 05:21 UTC
From: hoglabogla at hotmail dot com Assigned:
Status: Closed Package: *Regular Expressions
PHP Version: 4.0.3pl1 OS: Redhat Linux 7.0
Private report: No CVE-ID: None
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From: hoglabogla at hotmail dot com
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 [2000-10-16 15:29 UTC] hoglabogla at hotmail dot com 
$mask= "anything";
$mask= preg_replace("/\\/", "/a/", $mask);

if( $mask ) 
  echo "Empty? Hu? PHP-Bug?";
else
  echo "OK";

The preg_replace kills $mask, witch it shouldn't, i guess

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 [2000-10-16 15:31 UTC] hoglabogla at hotmail dot com 
Ooops! The other way round, of course:

if( $mask ) 
  echo "OK";
else
  echo "Empty? Hu? PHP-Bug?";
 [2000-10-23 05:21 UTC] stas@php.net 
Your regexp is wrong - it is passed to Perl as /\/, which is lacking the ending /. Since regexp is bad, NULL is returned, and that's what you get in $mask.
 
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