Bug #73913 [NEW]: broken strrpos with negative offset
From: proartex at mail dot ru
Operating system: macOS Sierra 10.12.1
PHP version: 5.6.29
Package: Strings related
Bug Type: Bug
Bug description:broken strrpos with negative offset
Description:
------------
It is seems broken at least in the following cases:
- if negative offset equals to haystack length;
- if negative offset less than needle length;
- if needle length equals to (haystack length + negative offset)
Negative offset should not move pointer but reduce search scope on the
value of offset. In that case character placed at 0 position must not be
found if search scope is reduced to empty string. Same should be applied
in boundary cases: character placed next to reduced search scope must
not be found (last case).
Test script:
---------------
<?php
var_dump(strrpos("aaaa", 'aa', -2)); //ER: 0, AR: 2
var_dump(strrpos("aaaa", 'a', -1)); //ER: 2, AR: 3
var_dump(strrpos("/documents/show/5474", '/', -20)); //ER: false, AR: 0
var_dump(strrpos("works_like_a_charm", 'charm', -3)); //ER: false, AR:
13
var_dump(strrpos("works_like_a_charm", 'charm', -4)); //ER: false, AR:
13
Expected result:
----------------
0
2
false
false
false
Actual result:
--------------
2
3
0
13
13
--
Edit bug report at https://bugs.php.net/bug.php?id=73913&edit=1
--
Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=73913&r=trysnapshot54
Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=73913&r=trysnapshot55
Try a snapshot (trunk): https://bugs.php.net/fix.php?id=73913&r=trysnapshottrunk
Fixed in SVN: https://bugs.php.net/fix.php?id=73913&r=fixed
Fixed in release: https://bugs.php.net/fix.php?id=73913&r=alreadyfixed
Need backtrace: https://bugs.php.net/fix.php?id=73913&r=needtrace
Need Reproduce Script: https://bugs.php.net/fix.php?id=73913&r=needscript
Try newer version: https://bugs.php.net/fix.php?id=73913&r=oldversion
Not developer issue: https://bugs.php.net/fix.php?id=73913&r=support
Expected behavior: https://bugs.php.net/fix.php?id=73913&r=notwrong
Not enough info: https://bugs.php.net/fix.php?id=73913&r=notenoughinfo
Submitted twice: https://bugs.php.net/fix.php?id=73913&r=submittedtwice
register_globals: https://bugs.php.net/fix.php?id=73913&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=73913&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=73913&r=dst
IIS Stability: https://bugs.php.net/fix.php?id=73913&r=isapi
Install GNU Sed: https://bugs.php.net/fix.php?id=73913&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=73913&r=float
No Zend Extensions: https://bugs.php.net/fix.php?id=73913&r=nozend
MySQL Configuration Error: https://bugs.php.net/fix.php?id=73913&r=mysqlcfg
Thread (7 messages)
- proartex at mail dot ru