Bug #55562 [Opn->Asn]: 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: pajoye@php.net Reported by: thomas at weinert dot info Summary: grapheme_substr() returns false if length parameter is to large -Status: Open +Status: Assigned Type: Bug Package: I18N and L10N related Operating System: Windows PHP Version: 5.3.8 -Assigned To: +Assigned To: stas Block user comment: N Private report: N New Comment: 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... Previous Comments: ------------------------------------------------------------------------ [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