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Bug #29774 no string variable allowed in function get_class_vars and get_class_methods
Submitted: 2004-08-20 22:02 UTC Modified: 2004-08-23 12:38 UTC
From: rkressirer at t-online dot de Assigned:
Status: Not a bug Package: Class/Object related
PHP Version: 5.0.0 OS: WIN2K
Private report: No CVE-ID: None
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From: rkressirer at t-online dot de
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 [2004-08-20 22:02 UTC] rkressirer at t-online dot de
Description:
------------
For to analyse objects the following function was written. According to the manual it should be possible to use a 'string class_name' as variable in the functions get_class_vars() and get_class_methods().
It turned out, that this is not the case. Only by replacing the variable (in this case 'KlassenName') by the function get_class($obj) the required result will be obtained.
The code shows both versions of each function and the respective Error Message.

(windows+apache1.x+php module version on localhost)

Reproduce code:
---------------
function object_structure($obj)
{
print ("Klasse: ".$KlassenName= (get_class($obj))."<br>");

$properties = (get_object_vars($obj)); 
while (list($prop, $val) = each($properties))
        echo "$prop = $val<br>";
//---------------------------------------------------------
//works:		
$stdClassVars = (get_class_vars(get_class($obj)));
while (list($prop) = each($stdClassVars))
        echo "Standardelement: $prop<br>";

//does not work: 
//Warning: Variable passed to each() is not an array or object in f:\programme\apache... 
$stdClassVars = (get_class_vars($KlassenName));
while (list($prop) = each($stdClassVars))
       echo "Standardelement: $prop<br>";			
//---------------------------------------------------------//works:		
$methods = (get_class_methods(get_class($obj)));
foreach ($methods as $method) print("Methode: ".$method."<br>");

//does not work:
//Warning: Invalid argument supplied for foreach() in f:\programme...
$methods = (get_class_methods($KlassenName));
foreach ($methods as $method) print("Methode: ".$method."<br>");
return;
}
?>

Expected result:
----------------
any existing class_variable or method of an object should be shown with both versions.
For testing I used:

class baugruppe{
public $BG_ID, $BG_NAME, $BG_NR='421500.000', $Version='d';
function __construct($BG_ID, $BG_NAME)
	{
	$this->BG_ID =$BG_ID;
	$this->BG_NAME=$BG_NAME;
	return;
	}
function show()
	{
	echo "$this->BG_ID<br>";
	echo "$this->BG_NR<br>";
	echo "$this->BG_NAME<br>";
	echo "$this->Version<br>";
	return;
	}
}	//end class
$transferarm= new baugruppe(3,'Transferarm');

Actual result:
--------------
only version marked with "works" shows results.

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 [2004-08-23 12:38 UTC] tony2001@php.net
Sorry, but your problem does not imply a bug in PHP itself.  For a
list of more appropriate places to ask for help using PHP, please
visit http://www.php.net/support.php as this bug system is not the
appropriate forum for asking support questions. 

Thank you for your interest in PHP.

Operator "." has higher precedence, than "=", so $KlassenName becomes (get_class($obj))."<br>" instead of "get_class($obj)".
Just take out assignment from the string and you'll get expected results.
 
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