From: mauroi at digbang dot com
Operating system: All
PHP version: Irrelevant
PHP Bug Type: Strings related
Bug description: substr and mb_substr work different
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 bug report at http://bugs.php.net/?id=28899&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=28899&r=trysnapshot4
Try a CVS snapshot (php5): http://bugs.php.net/fix.php?id=28899&r=trysnapshot5
Fixed in CVS: http://bugs.php.net/fix.php?id=28899&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=28899&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=28899&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=28899&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=28899&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=28899&r=support
Expected behavior: http://bugs.php.net/fix.php?id=28899&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=28899&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=28899&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=28899&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=28899&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=28899&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=28899&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=28899&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=28899&r=float
