Bug #55562 [Asn->Csd]: grapheme_substr() returns false if length parameter is to large

Edit report at https://bugs.php.net/bug.php?id=55562&edit=1 ID: 55562 Updated by: stas@php.net Reported by: thomas at weinert dot info Summary: grapheme_substr() returns false if length parameter is to large -Status: Assigned +Status: Closed Type: Bug Package: I18N and L10N related Operating System: Windows PHP Version: 5.3.8 Assigned To: stas Block user comment: N Private report: N New Comment: This bug has been fixed in SVN. 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/. For Windows: http://windows.php.net/snapshots/ Thank you for the report, and for helping us make PHP better. fixed, thanks Previous Comments: ------------------------------------------------------------------------ [2011-09-04 18:49:52] stas@php.net Automatic comment from SVN on behalf of stas Revision: http://svn.php.net/viewvc/?view=revision&amp;revision=316113 Log: fix bug 55562 - make substr always return rest of the string if length is too long ------------------------------------------------------------------------ [2011-09-04 17:14:06] pajoye@php.net I can confirm this bug, but I'm not sure how to fix it correctly. If I fix the related logic, the substr tests then partially fail. This function is cryptic and should really deserve some comments about what means each variable name and what are their goals... ------------------------------------------------------------------------ [2011-09-01 13:19:32] thomas at weinert dot info Description: ------------ If the input string contains multibyte characters and the length argument is greater then the possible maximum length of the result the function returns false. Test script: --------------- <?php var_dump( grapheme_substr('FOK', 1, 20), // expected: OK grapheme_substr('한국어', 1, 20) //expected: 국어 ); Expected result: ---------------- string(2) "OK" string(6) "국어" Actual result: -------------- string(2) "OK" bool(false) ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=55562&edit=1