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Request #30793 Abstract functions and default parameter
Submitted: 2004-11-15 13:48 UTC Modified: 2012-02-25 00:36 UTC
Votes:10
Avg. Score:3.9 ± 0.9
Reproduced:6 of 10 (60.0%)
Same Version:5 (83.3%)
Same OS:2 (33.3%)
From: jonas at datatal dot se Assigned: stas (profile)
Status: Closed Package: Class/Object related
PHP Version: * OS: *
Private report: No CVE-ID: None
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 [2004-11-15 13:48 UTC] jonas at datatal dot se 
Description:
------------
Don't know if this is a bug or a feature request. Any case, it's a Zend 2 problem..



Reproduce code:
---------------
<?php

abstract class DbClass
{
	protected $m_con;
	
	public function  __construct(ADOConnection $con)
	{
		$this->m_con = $con;
	}

	/** Factory method to create an object from the database */
	abstract public static function Get(ADOConnection $con, $id, $localeId);
}

class User extends dbClass
{
	public static function Get(ADOConnection $con, $id, $localeId = 1053)
	{
		
	}
	
}

?>

Expected result:
----------------
Should be possible to assign default values to parameters in overloaded abstract functions.

Actual result:
--------------
Fatal error: Declaration of User::Get() must be compatible with that of DbClass::Get() in d:\projects\inetpub\WebUser\test.php on line 23

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 [2004-11-15 13:59 UTC] jonas at datatal dot se 
Another related problem.

have this function in the same abstract class:

/** Fill the object with the information fetched from the db */
abstract public static function Fill(ADORecordset $rs, DbClass $db);

Since all db classes extends the DbClass this should be valid:

(in the user class)
public static function Fill(ADORecordset $rs, User $usr)
{
  [...]
}

but it isnt. I get the following error:

Fatal error: Declaration of User::Fill() must be compatible with that of DbClass::Fill() in d:\projects\inetpub\WebUser\Classes\User.php on line 83
 [2004-11-27 11:40 UTC] tony2001@php.net 
Well, personally I do not think such features could be accepted.
You get these errors because method signatures are different (number of required arguments and class hint differ), so this is well expected behaviour.

I'm leaving this report as feature request for Andi.
 [2004-11-29 15:54 UTC] jonas at datatal dot se 
I can agree on the second problem. But the first one should be valid (default parameter is still a parameter)
 [2004-11-29 15:57 UTC] tony2001@php.net 
>default parameter is still a parameter
right.
but providing default value for a parameter you're changing the number of required arguments.
 [2010-12-20 14:05 UTC] jani@php.net
-Package: Feature/Change Request +Package: Class/Object related -Operating System: +Operating System: * -PHP Version: 5.0.2 +PHP Version: *
 [2012-02-25 00:35 UTC] stas@php.net 
Please try using this snapshot:

  http://snaps.php.net/php5.3-latest.tar.gz
 
For Windows:

  http://windows.php.net/snapshots/

Seems to be working fine in 5.3.
 [2012-02-25 00:35 UTC] stas@php.net
-Status: Assigned +Status: Feedback
 [2012-02-25 00:36 UTC] stas@php.net
-Status: Feedback +Status: Closed -Assigned To: andi +Assigned To: stas
 
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