php.net |  support |  documentation |  report a bug |  advanced search |  search howto |  statistics |  random bug |  login

go to bug id or search bugs for

Bug #4281 cannot use a referenced argument with defaulting
Submitted: 2000-04-30 03:36 UTC Modified: 2000-07-04 16:05 UTC
From: andy at qabobala dot xapnet dot com Assigned:
Status: Closed Package: Scripting Engine problem
PHP Version: 4.0 Beta 4 OS: Linux 2.2.14
Private report: No CVE-ID: None
View Developer Edit
Welcome back! If you're the original bug submitter, here's where you can edit the bug or add additional notes.
If you forgot your password, you can retrieve your password here.
Password:
Status:
Package:
Bug Type:
Summary:
From: andy at qabobala dot xapnet dot com
New email:
PHP Version: OS:

 

 [2000-04-30 03:36 UTC] andy at qabobala dot xapnet dot com 
You cant use a reference with a default value (an optional function arg) when defining a function-- the parser will choke on this.

function ($somearg, &$object_ref = 0) {
  if($object_ref == 0) {
     ...
   }
  else { ... }
}

Maybe this fails because php needs a predefined NULL - which is a reference to the NULL object.  


later...

Patches

Pull Requests

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2000-07-04 16:05 UTC] stas at cvs dot php dot net 
Yes you cannot use defaults for reference. 
I am not sure this is possible at all in PHP. 
Initializer should eb a constant, while reference parameter should be modifiable.
 [2003-05-21 05:24 UTC] sailormax at inbox dot lv 
I need take argument-reference, but not obligatory. I write:
---------------------
function foo($arg = '')
{
 ...
}
foo(&$zz); // or foo()
---------------------
and have warning: Call-time pass-by-reference has been deprecated...

in documentation wrote:
~~~~~~~~~~~~~~~~~~~~~~~
Whether to enable the ability to force arguments to be passed by reference at function call time. This method is deprecated and is likely to be unsupported in future versions of PHP/Zend.
~~~~~~~~~~~~~~~~~~~~~~

And how I can now realize not obligatory argument-reference?
 
PHP Copyright © 2001-2025 The PHP Group
All rights reserved. 		Last updated: Mon Dec 22 22:00:01 2025 UTC