#50317 [NEW]: strrpos offset behavior is opposite of what docs describe

From: codeslinger at compsalot dot com Operating system: PHP version: Irrelevant PHP Bug Type: Documentation problem Bug description: strrpos offset behavior is opposite of what docs describe Description: ------------ the actual behavior of the offset for strrpos is exactly the opposite of what the docs lead me to expect. Reproduce code: --------------- --- From manual page: function.strrpos#Description --- Note: As of PHP 5.0.0 offset may be specified to begin searching an arbitrary number of characters into the string. Negative values will stop searching at an arbitrary point prior to the end of the string. ================== but what actually happens is that Positive values define the stopping point and Negative values define the starting point. Expected result: ---------------- $foo = "0123456789a123456789b123456789c"; echo strrpos($foo, '7', -5); //claim: stop searching after n chars (from the end of the string) //Expected: 27 || Actual: 17 //============== echo strrpos($foo, '7', 20); //claim: start searching (backwards) n chars into the string. //Expected: 17 || Actual: 27 //============== echo strrpos($foo, '7', 28); //Expected: 27 || Actual: false Actual result: -------------- as you can see from the examples, negative numbers define the point where it *starts* searching backwards offset from the end of the string. and positive numbers define the point from the beginning of the string where it *stops* searching. -- Edit bug report at http://bugs.php.net/?id=50317&edit=1 -- Try a snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=50317&r=trysnapshot52 Try a snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=50317&r=trysnapshot53 Try a snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=50317&r=trysnapshot60 Fixed in SVN: http://bugs.php.net/fix.php?id=50317&r=fixed Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=50317&r=needdocs Fixed in release: http://bugs.php.net/fix.php?id=50317&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=50317&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=50317&r=needscript Try newer version: http://bugs.php.net/fix.php?id=50317&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=50317&r=support Expected behavior: http://bugs.php.net/fix.php?id=50317&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=50317&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=50317&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=50317&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=50317&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=50317&r=dst IIS Stability: http://bugs.php.net/fix.php?id=50317&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=50317&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=50317&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=50317&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=50317&r=mysqlcfg