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Bug #47215 magic method __set() is bypassed on recursive call
Submitted: 2009-01-25 22:23 UTC Modified: 2009-01-26 00:09 UTC
Votes:1
Avg. Score:5.0 ± 0.0
Reproduced:1 of 1 (100.0%)
Same Version:1 (100.0%)
Same OS:1 (100.0%)
From: remy dot damour at laposte dot net Assigned:
Status: Not a bug Package: Class/Object related
PHP Version: 5.2.8 OS: debian
Private report: No CVE-ID: None
 [2009-01-25 22:23 UTC] remy dot damour at laposte dot net
Description:
------------
Magic method __set() is bypassed on recursive call. 
PHP automatically creates a property on instance instead of recursively calling __set() or instead of throwing a recursivity error

For additional details, please read: http://www.qc4blog.com/?p=458

Reproduce code:
---------------
class Fruits
{
	protected $_props = array(); // inner array mapping properties to values
	
	public function __set($name, $value) 
	{
		$this->_props[$name] = $value;
		if ('apple' == $name) {
			$this->apple = 'green';
		}
	}
}

$a = new Fruits();
$a->banana = 'yellow';
var_dump(property_exists($a, 'banana')); // output: false
$a->apple = 'red';
var_dump(property_exists($a, 'apple')); // output: true


Expected result:
----------------
Throw a recursivity exception

Actual result:
--------------
no exception thrown, property is automatically created by passing __set()

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 [2009-01-25 22:55 UTC] remy dot damour at laposte dot net
Maybe this is not a bug, but simply expected behavior?
Because otherwise we could not be able to define object properties using __set() magic method

Regards,
Remy
 [2009-01-26 00:09 UTC] johannes@php.net
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

.
 
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