From: funnyoz at hotmail dot fr
Operating system: Ubuntu 13.04
PHP version: 5.5.4
Package: Class/Object related
Bug Type: Feature/Change Request
Bug description:Impossibility to assign an object to a property upon declaration
Description:
------------
Hello,
This is a very important feature in OOP style, upon declaration, one
might need to assign an object as a default value, this is currently
possible for arrays or primitive types in PHP, but not for objects.
Example :
<?php
class Student {
private $address = AddressFactory::newInstance()->createAddress();
}
?>
The above code respects the best practices of OOP, it even uses the
Factory design pattern, yet in PHP it will fail because it can't be
evaluated at compilation.
Another simple example, say I've created a wrapper class for arrays, in
order to organize the different array functions, the following thing
will happen
<?php
class MyClass {
private $array1 = array(); //success
private $array2 = new MyArrayClass(); //failure
}
?>
Instantiating a property in the constructor is not a good practice in
object oriented programming :
<?php
class My Class {
private $array;
public function __construct(MyArrayClass $array) {
$this->array = $array;
//I no longer have an empty constructor, my constructor now
have
//parameters, not OOP recommended.
//Many scripts using Reflection API may instantiate
// this class without calling the constructor, hence having a
null $array property.
}
}
?>
This feature is a must in the next generation of PHP. Just think about
it.
Test script:
---------------
<?php
class My Class {
private $array = MyArrayClassFactory::createArray(); //hard fail
public function __construct(MyArrayClass $array) {
$this->array = $array;
//I no longer have an empty constructor, my constructor now
have
//parameters, not OOP recommended.
//Many scripts using Reflection API may instantiate
// this class without calling the constructor, hence having a
null $array property.
}
}
?>
Expected result:
----------------
Compiler's response : success :-)
Actual result:
--------------
Compiler's response : WTF did you type in line 20 column 12??
--
Edit bug report at https://bugs.php.net/bug.php?id=65843&edit=1
--
Try a snapshot (PHP 5.4):
https://bugs.php.net/fix.php?id=65843&r=trysnapshot54
Try a snapshot (PHP 5.5):
https://bugs.php.net/fix.php?id=65843&r=trysnapshot55
Try a snapshot (trunk):
https://bugs.php.net/fix.php?id=65843&r=trysnapshottrunk
Fixed in SVN: https://bugs.php.net/fix.php?id=65843&r=fixed
Fixed in release: https://bugs.php.net/fix.php?id=65843&r=alreadyfixed
Need backtrace: https://bugs.php.net/fix.php?id=65843&r=needtrace
Need Reproduce Script: https://bugs.php.net/fix.php?id=65843&r=needscript
Try newer version: https://bugs.php.net/fix.php?id=65843&r=oldversion
Not developer issue: https://bugs.php.net/fix.php?id=65843&r=support
Expected behavior: https://bugs.php.net/fix.php?id=65843&r=notwrong
Not enough info:
https://bugs.php.net/fix.php?id=65843&r=notenoughinfo
Submitted twice:
https://bugs.php.net/fix.php?id=65843&r=submittedtwice
register_globals: https://bugs.php.net/fix.php?id=65843&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=65843&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=65843&r=dst
IIS Stability: https://bugs.php.net/fix.php?id=65843&r=isapi
Install GNU Sed: https://bugs.php.net/fix.php?id=65843&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=65843&r=float
No Zend Extensions: https://bugs.php.net/fix.php?id=65843&r=nozend
MySQL Configuration Error: https://bugs.php.net/fix.php?id=65843&r=mysqlcfg
