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List:       php-doc-bugs
Subject:    [DOC-BUGS] [PHP-BUG] Doc #63832 [NEW]: Doc don't fully cover constr. inheritance
From:       "jschoett at gmail dot com"<php-bugs () lists ! php ! net>
Date:       2012-12-21 21:03:37
Message-ID: bug-63832 () bugs ! php ! net
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From:             jschoett at gmail dot com
Operating system: Doc problem
PHP version:      5.4.10
Package:          Documentation problem
Bug Type:         Documentation Problem
Bug description:Doc don't fully cover constr. inheritance

Description:
------------
---
From manual page: http://www.php.net/language.oop5.decon
---
I can not find a definite statement on this:
"The child class inherits the constructor of the base class, iff the child
class 
does not explicitly define an own constructor."

The documentation do not cover this with:
"Note: Parent constructors are not called implicitly if the child class
defines a 
constructor"

In addition, since this is an significant difference to e.g. Java, it
should be 
documented

Test script:
---------------
Snippet to validate this statement (I know you already know the result):
<?php
class A {
    private $x = null;
    function __construct($x) {
        $this->x = $x;
    }
}
class B extends A { }
$b1 = new B(); // Warning: Missing argument 1 for A::__construct()
$b2 = new B(1);
var_dump($b1); // Notice: Undefined variable: x
var_dump($b2);
?>

Expected result:
----------------
Same as actual, but I wan't it to be documented :)

Actual result:
--------------
Warning: Missing argument 1 for A::__construct(), called in
path\testoutput.php on 
line 28 and defined in path\testoutput.php on line 21

Notice: Undefined variable: x in path\testoutput.php on line 22
object(B)#1 (1) { ["x":"A":private]=> NULL } object(B)#2 (1) {
["x":"A":private]=> 
int(1) }

-- 
Edit bug report at https://bugs.php.net/bug.php?id=63832&edit=1
-- 
Try a snapshot (PHP 5.4):   https://bugs.php.net/fix.php?id=63832&r=trysnapshot54
Try a snapshot (PHP 5.3):   https://bugs.php.net/fix.php?id=63832&r=trysnapshot53
Try a snapshot (trunk):     https://bugs.php.net/fix.php?id=63832&r=trysnapshottrunk
Fixed in SVN:               https://bugs.php.net/fix.php?id=63832&r=fixed
Fixed in release:           https://bugs.php.net/fix.php?id=63832&r=alreadyfixed
Need backtrace:             https://bugs.php.net/fix.php?id=63832&r=needtrace
Need Reproduce Script:      https://bugs.php.net/fix.php?id=63832&r=needscript
Try newer version:          https://bugs.php.net/fix.php?id=63832&r=oldversion
Not developer issue:        https://bugs.php.net/fix.php?id=63832&r=support
Expected behavior:          https://bugs.php.net/fix.php?id=63832&r=notwrong
Not enough info:            https://bugs.php.net/fix.php?id=63832&r=notenoughinfo
Submitted twice:            https://bugs.php.net/fix.php?id=63832&r=submittedtwice
register_globals:           https://bugs.php.net/fix.php?id=63832&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=63832&r=php4
Daylight Savings:           https://bugs.php.net/fix.php?id=63832&r=dst
IIS Stability:              https://bugs.php.net/fix.php?id=63832&r=isapi
Install GNU Sed:            https://bugs.php.net/fix.php?id=63832&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=63832&r=float
No Zend Extensions:         https://bugs.php.net/fix.php?id=63832&r=nozend
MySQL Configuration Error:  https://bugs.php.net/fix.php?id=63832&r=mysqlcfg


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