Bug #70854 [NEW]: Cannot change database

From: rmoisto at gmail dot com Operating system: Ubuntu 15.10 PHP version: 7.0.0RC6 Package: MySQLi related Bug Type: Bug Bug description:Cannot change database Description: ------------ The select_db function does not work and produces a Warning when using a class that extends mysqli. This worked perfectly with PHP 5.6. As I have both PHP versions installed on this computer I switched between them several times to confirm this. I'm using PHP 7 RC6 that I compiled from source. The web server is nginx, using PHP with FPM. Test script: --------------- <?php class MyMysqli extends mysqli { public function e_select_db($db) { return $this->select_db($db); } } $mysqli = new MyMysqli('localhost', 'root', 'password'); $mysqli->e_select_db('db'); Expected result: ---------------- Database is selected. Actual result: -------------- Database is not selected. Also, the following Warning is written to the error log: PHP message: PHP Warning: mysqli::select_db(): Couldn't fetch MyMysqli in /var/www/public_html/test.php on line 4" while reading response header from upstream, client: 127.0.0.1, server: localhost, request: "GET /test.php HTTP/1.1", upstream: "fastcgi://unix:/var/run/php7-fpm.sock:", host: "localhost" -- Edit bug report at https://bugs.php.net/bug.php?id=70854&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=70854&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=70854&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=70854&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=70854&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=70854&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=70854&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=70854&r=needscript Try newer version: https://bugs.php.net/fix.php?id=70854&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=70854&r=support Expected behavior: https://bugs.php.net/fix.php?id=70854&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=70854&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=70854&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=70854&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=70854&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=70854&r=dst IIS Stability: https://bugs.php.net/fix.php?id=70854&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=70854&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=70854&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=70854&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=70854&r=mysqlcfg