[PHP-BUG] Req #74340 [NEW]: Magic function __get have different behavior in php 7.1.x

From:             x dot xiang at outlook dot com
Operating system: macOS/Linux
PHP version:      7.1.3
Package:          Class/Object related
Bug Type:         Feature/Change Request
Bug description:Magic function __get have different behavior in php 7.1.x

Description:
------------
Does the recursive call to the magic method be allowed?

Actual result in php 5.x and 7.0.x:
__get test
PHP Notice:  Undefined property: Test::$test in
/data1/data/playcrab/tmp/test4.php on line 10
__get test2
PHP Notice:  Undefined property: Test::$test in
/data1/data/playcrab/tmp/test4.php on line 12

Actual result in php 7.1.x:
__get test
PHP Notice:  Undefined property: Test::$test in
/data1/data/playcrab/tmp/test4.php on line 10
__get test2
__get test

Test script:
---------------
<?php
class Test
{
    public function __get($var)
    {
        static $first = true;
        echo '__get '.$var.PHP_EOL;
        if ($first) {
            $first = false;
            $this->$var;
            $this->{$var.'2'};
            $this->$var;
        }
    }
}

$test = new Test;
$test->test;


Expected result:
----------------
__get test
__get test
__get test2
__get test

Actual result:
--------------
__get test
PHP Notice:  Undefined property: Test::$test in
/data1/data/playcrab/tmp/test4.php on line 10
__get test2
__get test

-- 
Edit bug report at https://bugs.php.net/bug.php?id=74340&edit=1
-- 
Try a snapshot (PHP 5.4):   https://bugs.php.net/fix.php?id=74340&r=trysnapshot54
Try a snapshot (PHP 5.5):   https://bugs.php.net/fix.php?id=74340&r=trysnapshot55
Try a snapshot (trunk):     https://bugs.php.net/fix.php?id=74340&r=trysnapshottrunk
Fixed in SVN:               https://bugs.php.net/fix.php?id=74340&r=fixed
Fixed in release:           https://bugs.php.net/fix.php?id=74340&r=alreadyfixed
Need backtrace:             https://bugs.php.net/fix.php?id=74340&r=needtrace
Need Reproduce Script:      https://bugs.php.net/fix.php?id=74340&r=needscript
Try newer version:          https://bugs.php.net/fix.php?id=74340&r=oldversion
Not developer issue:        https://bugs.php.net/fix.php?id=74340&r=support
Expected behavior:          https://bugs.php.net/fix.php?id=74340&r=notwrong
Not enough info:            https://bugs.php.net/fix.php?id=74340&r=notenoughinfo
Submitted twice:            https://bugs.php.net/fix.php?id=74340&r=submittedtwice
register_globals:           https://bugs.php.net/fix.php?id=74340&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=74340&r=php4
Daylight Savings:           https://bugs.php.net/fix.php?id=74340&r=dst
IIS Stability:              https://bugs.php.net/fix.php?id=74340&r=isapi
Install GNU Sed:            https://bugs.php.net/fix.php?id=74340&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=74340&r=float
No Zend Extensions:         https://bugs.php.net/fix.php?id=74340&r=nozend
MySQL Configuration Error:  https://bugs.php.net/fix.php?id=74340&r=mysqlcfg