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Bug #49536 mb_detect_encoding() returns incorrect results when strict_mode is turned on
Submitted: 2009-09-11 21:23 UTC Modified: 2009-09-23 14:27 UTC
From: Assigned: moriyoshi
Status: Closed Package: mbstring related
PHP Version: 5.3SVN-2009-09-11 (SVN) OS: *
Private report: No CVE-ID:
 [2009-09-11 21:23 UTC]
mb_detect_encoding() produces wrong results from incomplete multibyte sequences when strict_mode is turned on. (originally reported by komura.db2r1e|at|gmail|dot|com)

Reproduce code:
// non-strict mode
var_dump(mb_detect_encoding("A\x81", "SJIS", false));
// strict mode
var_dump(mb_detect_encoding("A\x81", "SJIS", true));
// non-strict mode
var_dump(mb_detect_encoding("\xc0\x00", "UTF-8", false));
// strict mode
var_dump(mb_detect_encoding("\xc0\x00", "UTF-8", true));

Expected result:
string(4) "SJIS"
string(5) "UTF-8"

Actual result:
string(4) "SJIS"
string(4) "SJIS"
string(5) "UTF-8"
string(5) "UTF-8"


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 [2009-09-11 21:26 UTC]
Automatic comment from SVN on behalf of moriyoshi
Log: - Fix bug #49536 (mb_detect_encoding() returns incorrect results when strict_mode is turned on.)
  (patch by komura, thanks!)
 [2009-09-23 14:27 UTC]
This bug has been fixed in SVN.

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