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Doc Bug #41819 Old style Constructor inconsistencies
Submitted: 2007-06-27 07:46 UTC Modified: 2007-08-16 13:22 UTC
Votes:1
Avg. Score:5.0 ± 0.0
Reproduced:1 of 1 (100.0%)
Same Version:1 (100.0%)
Same OS:1 (100.0%)
From: oancea at gmail dot com Assigned:
Status: Not a bug Package: Documentation problem
PHP Version: 5.2.3 OS: *
Private report: No CVE-ID: None
View Developer Edit
 [2007-06-27 07:46 UTC] oancea at gmail dot com 
Description:
------------
There is an inconsistency between the old style class constructor (class name) and the new one (__construct) when defining interfaces (see reproduce code bellow).

Reproduce code:
---------------
interface IConfigurator {

  public function __construct();

}

class XmlConfigurator implements IConfigurator {

  public function XmlConfigurator() {
    printf("%s\n", __METHOD__);
  }

}

$config = new XmlConfigurator();


Expected result:
----------------
One of:

 * XmlConfigurator::XmlConfigurator
 * Fatal error: old style constructor is deprecated

Actual result:
--------------
Fatal error: Class XmlConfigurator contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (IConfigurator::__construct) in

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 [2007-06-27 08:28 UTC] tony2001@php.net 
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to report
a bug at http://bugs.php.net/how-to-report.php
 [2007-06-27 08:48 UTC] oancea at gmail dot com 
How about this one:

abstract class IConfigurator {

  public abstract function __construct();

}

class XmlConfigurator extends IConfigurator {

  public function XmlConfigurator() {
    printf("%s\n", __METHOD__);
  }

}

$config = new XmlConfigurator();


Can you point me to the exact documentation where it states that the old style constructor should not be used, at least not in interfaces or in abstract classes?

Thank-you.
 [2007-06-27 08:50 UTC] tony2001@php.net 
Nobody said it cannot be used, but __construct() and XMLConfigurator() are two different functions, so the result you get is pretty much expected.
 [2007-06-27 08:59 UTC] oancea at gmail dot com 
Well, as far as I can see, both of those functions are constructors, one (__constructor) specifies the signature of an object, and the other one implements it.

According to this bug (fixed in 5.1): http://bugs.php.net/bug.php?id=35720 in the end is the same method.

Anyway, thank you for your time, and I hope that at least the documentation will add my example as "don't do this because __construct and old style constructor are two different functions for interfaces or abstract classes"!
 [2007-06-27 10:11 UTC] oancea at gmail dot com 
Re-open to mark as a documentation problem.
 [2007-08-16 13:22 UTC] vrana@php.net 
Documentation is not saying that classname() is an alias of __construct(). It says that it is fallback if __construct() is not defined.

Your interface declares method which is not defined in the class.
 
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