Re: [PHP-DEV] Pb : access control

[Fabrice Le Coz]

here a code to test private variables
?php
// test private variables
class foo {
private $name = foo;

function __construct() {
$this-name = foo2;
}
}

class baz extends foo {
function show() {
echo  name : $this-name \n;
}
}

$test = new baz();
$test-show();
echo   name : $test-name \n;
?

this code expose the variable foo2 in the baz object (method show) which
normally can't be visible (private variable of the parent class), and expose
the variable in the main context.
Normally a fatal error must be generated when accessing private variables in
the main context (echo   name : $test-name \n;) and in the inheritance
context ($test-show();)

Hope that will help debug PHP5

Fabrice Le Coz
[EMAIL PROTECTED]



- Original Message -
From: Andi Gutmans [EMAIL PROTECTED]
To: Fabrice Le Coz [EMAIL PROTECTED]; [EMAIL PROTECTED]
Sent: Monday, March 17, 2003 9:00 PM
Subject: Re: [PHP-DEV] Pb : access control


 Can you cut down the script to like 10 lines and say what your result is
 and what you'd expect?

 At 05:37 PM 3/17/2003 +0100, Fabrice Le Coz wrote:
 Hi,
 
 I'm playing with PHP5 and have some trouble wtith access control, here's
the
 code I run with last php5 from snaps.php.net under windows XP :
 
 ?php
 class pere {
  private   $var3;
  public$var1;
  protected $var2;
 
  function __construct() {
  $this-var1 = public;
  $this-var2 = protected;
  $this-var3 = private;
  }
 
  function show() {
  echo pere::show() \n;
  echo var1 : $this-var1\n;
  echo var2 : $this-var2\n;
  echo var3 : $this-var3\n;
  echo \n;
  }
 }
 
 class fils extends pere {
  protected $var = fils;
  private   $var4 = test;
 
  function __construct() {
  parent::__construct();
  }
 
  function show_fils() {
  echo fils::show() \n;
  echo var1 : $this-var1\n;
  echo var2 : $this-var2\n;
  echo var3 : $this-var3\n;
  echo var  : $this-var\n;
  echo \n;
  }
 }
 
 function show_var($obj) {
  $obj_vars = get_object_vars($obj);
  foreach ($obj_vars as $name = $value) {
  if($name != ) echo $name : $value\n;
  }
  echo \n;
 }
 
 $test1 = new pere();
 $test1-show();
 echo Affichage des variables visibles de test1 :\n;
 show_var($test1);
 
 $test2 = new fils();
 $test2-show_fils();
 echo Affichage des variables visibles de test2 :\n;
 show_var($test2);
 $test2-show();
 echo var3 : .$test2-var3.\n;
 echo var4 : .$test2-var4.\n;
 ?
 
 and I've the following result :
 
 pere::show()
 var1 : public
 var2 : protected
 var3 : private
 
 Affichage des variables visibles de test1 :
 var1 : public
 
 fils::show()
 var1 : public
 var2 : protected
 var3 : private
 var  : fils
 
 Affichage des variables visibles de test2 :
 var1 : public
 var2 :
 var3 : private
 
 pere::show()
 var1 : public
 var2 : protected
 var3 : private
 
 var3 : private
 
 Fatal error: Cannot access private property fils::$var4 in
 D:\www\test\heritier.php on line 59
 
 Normally in the instance of fils object ($test2), I mustn't see
 $this-var3 which is private variable of the parent. if I comment the
line
 'echo var3 : $this-var3\n;' in the show_fils method, $test2-var3 is
 empty but do not generate an error !
 The show_var($test2) function expose a var2 variable which normally must
 send an Fatal error.
 
  Fabrice Le Coz
  [EMAIL PROTECTED]
 




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[PHP-DEV] Pb : access control

[Fabrice Le Coz]

Hi,

I'm playing with PHP5 and have some trouble wtith access control, here's the
code I run with last php5 from snaps.php.net under windows XP :

?php
class pere {
private   $var3;
public$var1;
protected $var2;

function __construct() {
$this-var1 = public;
$this-var2 = protected;
$this-var3 = private;
}

function show() {
echo pere::show() \n;
echo var1 : $this-var1\n;
echo var2 : $this-var2\n;
echo var3 : $this-var3\n;
echo \n;
}
}

class fils extends pere {
protected $var = fils;
private   $var4 = test;

function __construct() {
parent::__construct();
}

function show_fils() {
echo fils::show() \n;
echo var1 : $this-var1\n;
echo var2 : $this-var2\n;
echo var3 : $this-var3\n;
echo var  : $this-var\n;
echo \n;
}
}

function show_var($obj) {
$obj_vars = get_object_vars($obj);
foreach ($obj_vars as $name = $value) {
if($name != ) echo $name : $value\n;
}
echo \n;
}

$test1 = new pere();
$test1-show();
echo Affichage des variables visibles de test1 :\n;
show_var($test1);

$test2 = new fils();
$test2-show_fils();
echo Affichage des variables visibles de test2 :\n;
show_var($test2);
$test2-show();
echo var3 : .$test2-var3.\n;
echo var4 : .$test2-var4.\n;
?

and I've the following result :

pere::show()
var1 : public
var2 : protected
var3 : private

Affichage des variables visibles de test1 :
var1 : public

fils::show()
var1 : public
var2 : protected
var3 : private
var  : fils

Affichage des variables visibles de test2 :
var1 : public
var2 :
var3 : private

pere::show()
var1 : public
var2 : protected
var3 : private

var3 : private

Fatal error: Cannot access private property fils::$var4 in
D:\www\test\heritier.php on line 59

Normally in the instance of fils object ($test2), I mustn't see
$this-var3 which is private variable of the parent. if I comment the line
'echo var3 : $this-var3\n;' in the show_fils method, $test2-var3 is
empty but do not generate an error !
The show_var($test2) function expose a var2 variable which normally must
send an Fatal error.

Fabrice Le Coz
[EMAIL PROTECTED]



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