[PHP-BUG] Bug #78053 [NEW]: empty() when testing $obj->var with magic __get function

From:             bjorn dot macintosh at gmail dot com
Operating system: Mac
PHP version:      7.1.29
Package:          PHP Language Specification
Bug Type:         Bug
Bug description:empty() when testing $obj->var with magic __get function

Description:
------------
php -v
PHP 7.1.23 (cli) (built: Feb 22 2019 22:08:13) ( NTS )
Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.1.0, Copyright (c) 1998-2018 Zend Technologies

----

Created an object with a protected property

Created a magic get "__get($name) { return $this->name; }"

Assigned my variable a value within the class (in correct scope)

When testing if variable is empty outside of object scope it incorrectly
returns true for emptyness


Test script:
---------------
```
var_dump($obj->var, empty($obj->var));
// Outputs:
// $obj->var = "something"
// empty($obj-<var) = true

But it will work if I pre-retrieve the variable.
$val = $obj->var
var_dump($var, empty($var));
// Outputs:
// $obj->var = "something"
// empty($obj-<var) = false

```

Expected result:
----------------
empty on protected variable with a getter should resolve the getter
first, then test emptyness

Actual result:
--------------
empty call on a protected $obj->var - with a magic __get - returns true
even if variable is not empty

-- 
Edit bug report at https://bugs.php.net/bug.php?id=78053&edit=1
-- 
Try a snapshot (PHP 5.4):   https://bugs.php.net/fix.php?id=78053&r=trysnapshot54
Try a snapshot (PHP 5.5):   https://bugs.php.net/fix.php?id=78053&r=trysnapshot55
Try a snapshot (trunk):     https://bugs.php.net/fix.php?id=78053&r=trysnapshottrunk
Fixed in SVN:               https://bugs.php.net/fix.php?id=78053&r=fixed
Fixed in release:           https://bugs.php.net/fix.php?id=78053&r=alreadyfixed
Need backtrace:             https://bugs.php.net/fix.php?id=78053&r=needtrace
Need Reproduce Script:      https://bugs.php.net/fix.php?id=78053&r=needscript
Try newer version:          https://bugs.php.net/fix.php?id=78053&r=oldversion
Not developer issue:        https://bugs.php.net/fix.php?id=78053&r=support
Expected behavior:          https://bugs.php.net/fix.php?id=78053&r=notwrong
Not enough info:            https://bugs.php.net/fix.php?id=78053&r=notenoughinfo
Submitted twice:            https://bugs.php.net/fix.php?id=78053&r=submittedtwice
register_globals:           https://bugs.php.net/fix.php?id=78053&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=78053&r=php4
Daylight Savings:           https://bugs.php.net/fix.php?id=78053&r=dst
IIS Stability:              https://bugs.php.net/fix.php?id=78053&r=isapi
Install GNU Sed:            https://bugs.php.net/fix.php?id=78053&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=78053&r=float
No Zend Extensions:         https://bugs.php.net/fix.php?id=78053&r=nozend
MySQL Configuration Error:  https://bugs.php.net/fix.php?id=78053&r=mysqlcfg