Bug #69977 [NEW]: overriding DateTime::add() and sub() issues warnings when using type hints

From: Date: Wed, 01 Jul 2015 13:31:43 +0000
Subject: Bug #69977 [NEW]: overriding DateTime::add() and sub() issues warnings when using type hints
Groups: php.bugs 
Request: Send a blank email to php-bugs+get-194033@lists.php.net to get a copy of this message
From:             phofstetter at sensational dot ch
Operating system: Mac OS X
PHP version:      7.0.0alpha2
Package:          *General Issues
Bug Type:         Bug
Bug description:overriding DateTime::add() and sub() issues warnings when using type hints

Description:
------------
When you subclass DateTime, PHP insists on there being no type hint
present for add() and sub(). If you type-hint them to
DateInterval, php throws a warning about the signature not matching
the parent, even though the manual (and reality agrees) says that the
argument is a DateTimeInterval.

While I would personally love for this warning to be turnoaffable or at
least not be a warning but a notice, it certainy shouldn't warn for
correct usage.

As it stands now, code that was using type hints issues warnings until
the type hints are removed, even though DateTime::add() also issues a
warning if you pass anything but a DateInterval as an argument.

Test script:
---------------
<?php

class Foo extends DateTime {
    function add(DateInterval $interval){ parent::add($interval); }
}


Expected result:
----------------
no output. No warning

Actual result:
--------------
PHP Warning:  Declaration of Foo::add() should be compatible with
DateTime::add($interval) in foo.php on line 5

-- 
Edit bug report at https://bugs.php.net/bug.php?id=69977&edit=1
-- 
Try a snapshot (PHP 5.4):   https://bugs.php.net/fix.php?id=69977&r=trysnapshot54
Try a snapshot (PHP 5.5):   https://bugs.php.net/fix.php?id=69977&r=trysnapshot55
Try a snapshot (trunk):     https://bugs.php.net/fix.php?id=69977&r=trysnapshottrunk
Fixed in SVN:               https://bugs.php.net/fix.php?id=69977&r=fixed
Fixed in release:           https://bugs.php.net/fix.php?id=69977&r=alreadyfixed
Need backtrace:             https://bugs.php.net/fix.php?id=69977&r=needtrace
Need Reproduce Script:      https://bugs.php.net/fix.php?id=69977&r=needscript
Try newer version:          https://bugs.php.net/fix.php?id=69977&r=oldversion
Not developer issue:        https://bugs.php.net/fix.php?id=69977&r=support
Expected behavior:          https://bugs.php.net/fix.php?id=69977&r=notwrong
Not enough info:            https://bugs.php.net/fix.php?id=69977&r=notenoughinfo
Submitted twice:            https://bugs.php.net/fix.php?id=69977&r=submittedtwice
register_globals:           https://bugs.php.net/fix.php?id=69977&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=69977&r=php4
Daylight Savings:           https://bugs.php.net/fix.php?id=69977&r=dst
IIS Stability:              https://bugs.php.net/fix.php?id=69977&r=isapi
Install GNU Sed:            https://bugs.php.net/fix.php?id=69977&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=69977&r=float
No Zend Extensions:         https://bugs.php.net/fix.php?id=69977&r=nozend
MySQL Configuration Error:  https://bugs.php.net/fix.php?id=69977&r=mysqlcfg



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