On 18 May 2010 16:12, mathieu.suen <mathieu.s...@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.php>
> ( 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 "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 = new counting();
echo $a->count();
?>
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