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Bug #41382 ReflectionParameter isDefaultValueAvailable() is not working as expected
Submitted: 2007-05-13 09:39 UTC Modified: 2007-05-13 10:30 UTC
From: hasin at pageflakes dot com Assigned:
Status: Not a bug Package: SPL related
PHP Version: 5.2.2 OS: Windows XP
Private report: No CVE-ID: None
 [2007-05-13 09:39 UTC] hasin at pageflakes dot com
The isDefaultValueAvailable() of ReflectionParameter object doesn't return true for any parameter if the next parameter in collection has no default value. To regenerate the bug, execute the following script

Reproduce code:
class TestClass
	public function __construct($a , $b=6 , $c = "hh", $d, $e=76)


$class = new ReflectionClass("TestClass");
$method= $class->getMethod("__construct");
$parameter = $method->getParameters();

foreach ($parameter as $param)
	if ($param->isDefaultValueAvailable())
		if (is_null($param->getDefaultValue()))
		echo $param->getName()." : null \n";
		echo $param->getName()." : ".$param->getDefaultValue()."\n";

Expected result:
b : 6
c : hh
e : 76

Actual result:
e : 76


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 [2007-05-13 10:30 UTC]
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at and the instructions on how to report
a bug at

In your example $b and $c aren?t optional since an parameter without default value ($d) is present afterwards, too. We don?t store these values since the engine needs default values only for optional parameters.

See also example 17.9
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