Bug #74222 [Nab]: $this value can be overwritten with a variable variable.

Edit report at https://bugs.php.net/bug.php?id=74222&edit=1 ID: 74222 User updated by: marco dot agnoli at me dot com Reported by: marco dot agnoli at me dot com Summary: $this value can be overwritten with a variable variable. Status: Not a bug Type: Bug Package: *General Issues Operating System: OS X -PHP Version: Irrelevant +PHP Version: PHP 7.0.x & PHP 5.x Block user comment: N Private report: N New Comment: Updated affected PHP versions. Previous Comments: ------------------------------------------------------------------------ [2017-03-08 04:51:58] marco dot agnoli at me dot com Sorry, I tested it again and saw the following behavior: PHP 7.1.x is not affected while PHP 5.6.x and PHP 7.0.x are. ------------------------------------------------------------------------ [2017-03-08 04:47:21] pollita@php.net PHP version *is* relevant. So is trying to reassign $this is a context where it matters. See: https://3v4l.org/MpDOn ------------------------------------------------------------------------ [2017-03-08 03:56:06] marco dot agnoli at me dot com Description: ------------ I don't know whether that's intentional behavior or not but the $this value can be overwritten with a variable variable (see test code below). Test script: --------------- <?php $var = 'this'; $$var = 10; echo $this; // Echos 10 // Generates a fatal error $this = 10; Expected result: ---------------- A PHP Fatal error message. Actual result: -------------- $this gets silently overwritten. ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=74222&edit=1