Bug #62759 [NEW]: Buggy grapheme_substr() on edge case

From: okin7 at yahoo dot fr Operating system: PHP version: 5.4.5 Package: *Languages/Translation Bug Type: Bug Bug description:Buggy grapheme_substr() on edge case Description: ------------ See test script below. The strangest behavior is the difference between a pure ASCII string and an UTF-8 with chars in the [80-FFFF] range. The other wrong thing is the difference of behavior between substr() and grapheme_substr(). I think substr's behavior is the good one. Test script: --------------- <?php var_dump(substr('deja', 1, -4)); var_dump(substr('deja', -1, 0)); var_dump(grapheme_substr('deja', 1, -4)); var_dump(grapheme_substr('deja', -1, 0)); var_dump(grapheme_substr('déjà', 1, -4)); var_dump(grapheme_substr('déjà', -1, 0)); ?> Expected result: ---------------- bool(false) string(0) "" bool(false) string(0) "" bool(false) string(0) "" Actual result: -------------- bool(false) string(0) "" bool(false) string(0) "" string(5) "éjà" bool(false) -- Edit bug report at https://bugs.php.net/bug.php?id=62759&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=62759&r=trysnapshot54 Try a snapshot (PHP 5.3): https://bugs.php.net/fix.php?id=62759&r=trysnapshot53 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=62759&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=62759&r=fixed Fixed in SVN and need be documented: https://bugs.php.net/fix.php?id=62759&r=needdocs Fixed in release: https://bugs.php.net/fix.php?id=62759&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=62759&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=62759&r=needscript Try newer version: https://bugs.php.net/fix.php?id=62759&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=62759&r=support Expected behavior: https://bugs.php.net/fix.php?id=62759&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=62759&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=62759&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=62759&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=62759&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=62759&r=dst IIS Stability: https://bugs.php.net/fix.php?id=62759&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=62759&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=62759&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=62759&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=62759&r=mysqlcfg