Bug #68644 [NEW]: strlen incorrect : mbstring + func_overload=2 + UTF-8 + Opcache

From: e dot furmanyuk at timeweb dot ru Operating system: Ubuntu, Centos PHP version: 5.6.4 Package: opcache Bug Type: Bug Bug description:strlen incorrect : mbstring + func_overload=2 + UTF-8 + Opcache Description: ------------ Greetings. If set in php.ini mbstring.func_overload=2 mbstring.internal_encoding="UTF-8" or in .htaccess php_value mbstring.func_overload 2 php_value mbstring.internal_encoding UTF-8 And set enable extension mbstring and opcache. And after all run the script, the result will be the first implementation of the correct result, but subsequent executions F5 will give an incorrect result. Strlen not overload by mb_strlen. Other function such as substr and strtolower and etc work perfectly. If you disable opcahe problem disappears. Test script: --------------- <?php echo "strlen = ".strlen("\xd0\xa2\xd0\xa2\xd0\xa2\xd0\xa2\xd0\xa2\xd0\xa2")."\n<br>" ; echo "mb_strlen = ".mb_strlen ("\xd0\xa2\xd0\xa2\xd0\xa2\xd0\xa2\xd0\xa2\xd0\xa2")."\n<br>"; ?> Expected result: ---------------- 6 6 Actual result: -------------- 12 6 -- Edit bug report at https://bugs.php.net/bug.php?id=68644&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=68644&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=68644&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=68644&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=68644&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=68644&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=68644&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=68644&r=needscript Try newer version: https://bugs.php.net/fix.php?id=68644&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=68644&r=support Expected behavior: https://bugs.php.net/fix.php?id=68644&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=68644&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=68644&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=68644&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=68644&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=68644&r=dst IIS Stability: https://bugs.php.net/fix.php?id=68644&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=68644&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=68644&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=68644&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=68644&r=mysqlcfg