#28899 [Opn->Ana]: substr and mb_substr work different

ID: 28899 Updated by: moriyoshi@php.net Reported By: mauroi at digbang dot com -Status: Open +Status: Analyzed Bug Type: Strings related Operating System: All PHP Version: Irrelevant New Comment: Good catch. Logically it seems substr() is wrong and mb_substr() is correct. Previous Comments: ------------------------------------------------------------------------ [2004-06-23 21:21:51] mauroi at digbang dot com Description: ------------ if I make the following call I get FALSE. var_dump(substr('', 0)); The documentation says "If string is less than start characters long, FALSE will be returned". That can be very ambiguous because start is 0 and the length of the string is 0 (not less). Another problem: mb_substr does not work like this. If you overload the functions and make the same call as above it will return an empty string. Thanks in advance. Reproduce code: --------------- var_dump(substr('', 0)); var_dump(mb_substr('', 0)); Expected result: ---------------- '' '' Or FALSE FALSE Actual result: -------------- FALSE '' ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=28899&edit=1