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Date: Tue, 18 May 2010 16:50:51 +0100
Message-ID: <AANLkTimLG65qkSO7pZrMTtZQJOmgVFEZspG_mKdjUtC2@mail.gmail.com>
To: "mathieu.suen" <mathieu.suen@easyflirt.com>
Cc: PHP internals <internals@lists.php.net>
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Subject: Re: [PHP-DEV] Interface and abstract method
From: rquadling@googlemail.com (Richard Quadling)

On 18 May 2010 16:12, mathieu.suen <mathieu.suen@easyflirt.com> wrote:
> Hi,
>
> In the SPL there is some interface that have abstract method:
>
> *Countable* {
> /* Methods */
> abstract public int count <http://www.php.net/manual/en/countable.count.p=
hp>
> ( void )
> }
>
> While some interface have "none abstract" method.
>
> *OuterIterator* extends Iterator
> <http://www.php.net/manual/en/class.iterator.php> {
> /* Methods */
> public Iterator getInnerIterator
> <http://www.php.net/manual/en/outeriterator.getchildren.php> ( void )
> ..snip..
> }
>
> Does =C2=A0"abstract" keyword have a semantic?
>
> Thanks
>
> --Mathieu suen
>
>
>
>

http://docs.php.net/abstract

By the nature of the method being in an interface, it is automatically
abstract - there is no code behind the method in an interface. So you
must supply the code in any class that implements the interface.
Unless the sub-class is declared as an abstract class ...

<?php
abstract class counter implements countable {
}

class counting extends counter {
  public function count() {
    return 1;
  }
}

$a =3D new counting();
echo $a->count();
?>




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