#45733 [Opn->Bgs]: __get, __set error when undefined class member

From: Date: Wed, 06 Aug 2008 14:38:12 +0000
Subject: #45733 [Opn->Bgs]: __get, __set error when undefined class member
References: 1  Groups: php.bugs 
Request: Send a blank email to php-bugs+get-127666@lists.php.net to get a copy of this message 
 ID:               45733
 Updated by:       lbarnaud@php.net
 Reported By:      twilek at twilek dot hu
-Status:           Open
+Status:           Bogus
 Bug Type:         Reproducible crash
 Operating System: Ubuntu Linux
 PHP Version:      5.2.6
 New Comment:

Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to
report
a bug at http://bugs.php.net/how-to-report.php

Using $this->$name in __get() creates an infinite recursion (it calls
__get(), which calls __get(), etc), this is expected.


Previous Comments:
------------------------------------------------------------------------

[2008-08-06 14:28:02] twilek at twilek dot hu

Description:
------------
When i call the __get or __set with an invalid member variable, the php
interpreter is crash.
If i check the name with isset() then no crash!

PHP Version 5.2.4-2ubuntu5.3 (newest version in ubuntu)

Reproduce code:
---------------
class Test
{
  private $mVar = "var";

  public function __get( $name )
  {
     $name = "m" . $name;
     // if ( !isset( $this->$name ) ) return ""; //NO CRASH!!
     return $this->$name;
  }

  public function __set( $name, $value )
  {
    $name = "m" . $name;
     // if ( !isset( $this->$name ) ) return; //NO CRASH!!
    $this->$name = $value;
    echo( "Set: \$this->" . $name . " = " . $value );
  }
}

$t = new Test;
echo "Good: " . $t->Var;
echo "Bad: " . $t->Variable;

$t->Variable = "test";






Expected result:
----------------
Good: "var"
Bad: ""

Set: $this->Variable = "test"


Actual result:
--------------
exit signal Segmentation fault (11)


------------------------------------------------------------------------


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