[PHP-BUG] Bug #73220 [NEW]: Classes implementing an interface can violate its method's signatures

From:             phansys at gmail dot com
Operating system: any
PHP version:      7.0.11
Package:          PHP Language Specification
Bug Type:         Bug
Bug description:Classes implementing an interface can violate its method's signatures

Description:
------------
Classes implementing an interface can violate its method's signatures by
adding more arguments with a default value.

Test script:
---------------
interface A
{
    public function test($one = null);
}

class B implements A
{
    public function test($one = null, $two = null)
    {
        var_dump($one, $two);
    }
}

Expected result:
----------------
Fatal error: Declaration of B::test($one, $two) must be compatible with
A::test($one = NULL)

Actual result:
--------------
No error.

-- 
Edit bug report at https://bugs.php.net/bug.php?id=73220&edit=1
-- 
Try a snapshot (PHP 5.4):   https://bugs.php.net/fix.php?id=73220&r=trysnapshot54
Try a snapshot (PHP 5.5):   https://bugs.php.net/fix.php?id=73220&r=trysnapshot55
Try a snapshot (trunk):     https://bugs.php.net/fix.php?id=73220&r=trysnapshottrunk
Fixed in SVN:               https://bugs.php.net/fix.php?id=73220&r=fixed
Fixed in release:           https://bugs.php.net/fix.php?id=73220&r=alreadyfixed
Need backtrace:             https://bugs.php.net/fix.php?id=73220&r=needtrace
Need Reproduce Script:      https://bugs.php.net/fix.php?id=73220&r=needscript
Try newer version:          https://bugs.php.net/fix.php?id=73220&r=oldversion
Not developer issue:        https://bugs.php.net/fix.php?id=73220&r=support
Expected behavior:          https://bugs.php.net/fix.php?id=73220&r=notwrong
Not enough info:            https://bugs.php.net/fix.php?id=73220&r=notenoughinfo
Submitted twice:            https://bugs.php.net/fix.php?id=73220&r=submittedtwice
register_globals:           https://bugs.php.net/fix.php?id=73220&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=73220&r=php4
Daylight Savings:           https://bugs.php.net/fix.php?id=73220&r=dst
IIS Stability:              https://bugs.php.net/fix.php?id=73220&r=isapi
Install GNU Sed:            https://bugs.php.net/fix.php?id=73220&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=73220&r=float
No Zend Extensions:         https://bugs.php.net/fix.php?id=73220&r=nozend
MySQL Configuration Error:  https://bugs.php.net/fix.php?id=73220&r=mysqlcfg