Bug #72036 [NEW]: Reference parameters of functions fail to work properly in some cases

From: karl dot riedling at tuwien dot ac dot at Operating system: Linux 2.6.32-042stab PHP version: 7.0.5 Package: Scripting Engine problem Bug Type: Bug Bug description:Reference parameters of functions fail to work properly in some cases Description: ------------ Functions with reference parameters that modify the value of the parameter within a switch() construct return the original value of the reference parameter rather than the modified one. This does not apply if the reference parameter is changed in an if() statement or in plain linear code; PHP 7.0.5 shows the expected behavior in these cases. This problem newly appeared with PHP 7.0.5. The test script below returns with PHP 7.0.4: PHP Version: 7.0.4 23:12:25 Before function call: 1 In function call: 2 After function call: 2 Bug with PHP 7.0.5: PHP Version: 7.0.5 21:14:06 Before function call: 1 In function call: 2 After function call: 1 Test script: --------------- function test_func (& $x) { switch ($x) { case 1: $x = 2; break; case 2: break; } echo "In function call: ".$x."<br>\n"; } $x = 1; echo date ("H:i:s")."<br>\n"; echo "Before function call: ".$x."<br>\n"; test_func ($x); echo "After function call: ".$x."<br>\n"; Expected result: ---------------- Before function call: 1 In function call: 2 After function call: 2 Actual result: -------------- Before function call: 1 In function call: 2 After function call: 1 -- Edit bug report at https://bugs.php.net/bug.php?id=72036&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=72036&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=72036&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=72036&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=72036&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=72036&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=72036&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=72036&r=needscript Try newer version: https://bugs.php.net/fix.php?id=72036&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=72036&r=support Expected behavior: https://bugs.php.net/fix.php?id=72036&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=72036&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=72036&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=72036&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=72036&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=72036&r=dst IIS Stability: https://bugs.php.net/fix.php?id=72036&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=72036&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=72036&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=72036&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=72036&r=mysqlcfg