From: richc at drivecurrent dot com Operating system: Linux Redhat PHP version: 5.2.6 PHP Bug Type: Variables related Bug description: Variable copies corrupted by memcache problem
Description: ------------ I believe a problem with memcache reveals a problem with PHP. (PECL Memcache bug: http://pecl.php.net/bugs/bug.php?id=14239) A call to memcache changes the parameter variable to 'string' type. The PHP problem is that this conversion is passed to ancestor and decendent copies of the variable, even through function calls, even though passed by value, not reference. This appears to be similar to PHP Bug #42813, closed as Bogus. This is a newly compiled PHP installation using latest PHP, PECL, memcached. Reproduce code: --------------- $value1 = 1.2; $value2 = $value1; // this value is being passed -- all get modified $value3 = $value2; echo '<br>1 ' . gettype($value1) . ' / ' . gettype($value2) . ' / ' . gettype($value3); set('asdf', $value2); echo '<br>4 ' . gettype($value1) . ' / ' . gettype($value2) . ' / ' . gettype($value3); function set( $key, $valueA ) { $valueB = $valueA; // this value is being passed -- all get modified $valueC = $valueB; echo '<br>2 ' . gettype($valueA) . ' / ' . gettype($valueB) . ' / ' . gettype($valueC); $m = new Memcache(); $m->addServer('localhost'); $m->set($key, $valueB); echo '<br>3 ' . gettype($valueA) . ' / ' . gettype($valueB) . ' / ' . gettype($valueC); } Expected result: ---------------- Even when memcache bug corrupts $valueB, others should not be affected: 1 double / double / double 2 double / double / double 3 double / string / double 4 double / string / double Actual result: -------------- 1 double / double / double 2 double / double / double 3 string / string / string 4 string / string / string -- Edit bug report at http://bugs.php.net/?id=45360&edit=1 -- Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=45360&r=trysnapshot52 Try a CVS snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=45360&r=trysnapshot53 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=45360&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=45360&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=45360&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=45360&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=45360&r=needscript Try newer version: http://bugs.php.net/fix.php?id=45360&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=45360&r=support Expected behavior: http://bugs.php.net/fix.php?id=45360&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=45360&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=45360&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=45360&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=45360&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=45360&r=dst IIS Stability: http://bugs.php.net/fix.php?id=45360&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=45360&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=45360&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=45360&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=45360&r=mysqlcfg
