From: zyss at mail dot zp dot ua
Operating system: Irrelevant
PHP version: 5.2.8
PHP Bug Type: Feature/Change Request
Bug description: Typed function arguments should allow nulls
Description:
------------
Currently class type can be specified as function argument type, but it is
frequently required to pass null instead of object reference when there is
a default argument value set and it is null. In the following example
constructor's $parent argument can be null for the top-level objects, but
current PHP version doesn't allow it to be null forcing to remove type
declaration that is very undesirable:
class ExElement extends Exception { };
class Element {
protected /* Document */ $document; // each element references
document for fast access
protected /* Element */ $parent;
function __construct(Document $document, Element $parent = null) /*
throws ExElement */ {
$this->document = $document; // is still checked by PHP to be valid
Document object reference
if ($parent && ($parent->getDocument() != $document))
throw new ExElement("Parent's document doesn't match Element
constructor's argument", 1);
$this->parent = $parent;
}
function getDocument() {
return $this->document;
}
}
--
Edit bug report at http://bugs.php.net/?id=46899&edit=1
--
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=46899&r=trysnapshot52
Try a CVS snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=46899&r=trysnapshot53
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=46899&r=trysnapshot60
Fixed in CVS:
http://bugs.php.net/fix.php?id=46899&r=fixedcvs
Fixed in CVS and need be documented:
http://bugs.php.net/fix.php?id=46899&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=46899&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=46899&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=46899&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=46899&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=46899&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=46899&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=46899&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=46899&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=46899&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=46899&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=46899&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=46899&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=46899&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=46899&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=46899&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=46899&r=mysqlcfg
