From:             baldurien at bbnwn dot eu
Operating system: 
PHP version:      Irrelevant
PHP Bug Type:     Documentation problem
Bug description:  Typehinting support null value but the docs hide the facts!

Description:
------------
The documentation is missing the fact that the following statement is
possible :

function o1(Foo  $arg0 = null, $x) {}
function o2(Foo& $arg0 = null, $x) {}

The code above works on 5.2.3 (which is fine).

The fact that a typehinted parameter can have a default (enforced to null)
value should be explained at least in the type hinting part of the doc
[http://ch2.php.net/manual/en/language.oop5.typehinting], with the version
of php that support it (I can't remember it it was  working on 5.1).

Note also that the syntax can be misleading: one can easily think that
$arg0 take a default value, and that o1('a') is possible (or o1(,'a')?).




-- 
Edit bug report at http://bugs.php.net/?id=41958&edit=1
-- 
Try a CVS snapshot (PHP 4.4): 
http://bugs.php.net/fix.php?id=41958&r=trysnapshot44
Try a CVS snapshot (PHP 5.2): 
http://bugs.php.net/fix.php?id=41958&r=trysnapshot52
Try a CVS snapshot (PHP 6.0): 
http://bugs.php.net/fix.php?id=41958&r=trysnapshot60
Fixed in CVS:                 http://bugs.php.net/fix.php?id=41958&r=fixedcvs
Fixed in release:             
http://bugs.php.net/fix.php?id=41958&r=alreadyfixed
Need backtrace:               http://bugs.php.net/fix.php?id=41958&r=needtrace
Need Reproduce Script:        http://bugs.php.net/fix.php?id=41958&r=needscript
Try newer version:            http://bugs.php.net/fix.php?id=41958&r=oldversion
Not developer issue:          http://bugs.php.net/fix.php?id=41958&r=support
Expected behavior:            http://bugs.php.net/fix.php?id=41958&r=notwrong
Not enough info:              
http://bugs.php.net/fix.php?id=41958&r=notenoughinfo
Submitted twice:              
http://bugs.php.net/fix.php?id=41958&r=submittedtwice
register_globals:             http://bugs.php.net/fix.php?id=41958&r=globals
PHP 3 support discontinued:   http://bugs.php.net/fix.php?id=41958&r=php3
Daylight Savings:             http://bugs.php.net/fix.php?id=41958&r=dst
IIS Stability:                http://bugs.php.net/fix.php?id=41958&r=isapi
Install GNU Sed:              http://bugs.php.net/fix.php?id=41958&r=gnused
Floating point limitations:   http://bugs.php.net/fix.php?id=41958&r=float
No Zend Extensions:           http://bugs.php.net/fix.php?id=41958&r=nozend
MySQL Configuration Error:    http://bugs.php.net/fix.php?id=41958&r=mysqlcfg

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