is_null() and is_string() reversed when using in switch case statements...

Can someone double check me here, but I think I found a bug... <?php /* $ php -v PHP 5.3.6 with Suhosin-Patch (cli) (built: Apr 28 2011 14:20:48) Copyright (c) 1997-2011 The PHP Group Zend Engine v2.3.0, Copyright (c) 1998-2011 Zend Technologies with Xdebug v2.0.5, Copyright (c) 2002-2008, by Derick Rethans */ function test($v) { var_dump($v); if (is_string($v)) echo "FOUND A STRING.\n"; if (is_null($v)) echo "FOUND A NULL.\n"; switch ($v) { case is_string($v): echo "I think v is a string, so this is broken.\n"; break; case is_null($v): echo "I think v is null, so this is broken.\n"; break; case is_object($v): $v = '{CLASS::'.get_class($v).'}'; echo "I think v is a class $v\n"; break; case is_bool($v): $v = ($v) ? '{TRUE}' : '{FALSE}'; echo "I think v is boolean $v\n"; break; case is_array($v): $v = '['.implode(',',$v).']'; echo "I think v is an array $v\n"; break; case is_numeric($v): echo "I think v is a number $v\n"; break; } } class SomeClass {} test(''); test(null); test(new SomeClass()); test(true); test(69); test(array(1,2,3,4,5)); /* Output will be: string '' (length=0) FOUND A STRING. I think v is null, so this is broken. null FOUND A NULL. I think v is a string, so this is broken. object(SomeClass)[1] I think v is a class {CLASS::SomeClass} boolean true I think v is boolean {TRUE} int 69 I think v is a number 69 array 0 => int 1 1 => int 2 2 => int 3 3 => int 4 4 => int 5 I think v is an array [1,2,3,4,5] */ ?>