note 85582 added to language.oop5.patterns
| From: | Mattlock at osu1 dot php dot net | Date: | Sun, 07 Sep 2008 01:49:37 +0000 |
| Subject: | note 85582 added to language.oop5.patterns | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-144206@lists.php.net to get a copy of this message | ||
I've been forward-developing for PHP 5.3, and couldn't help but notice that
late-static-binding makes implementing Singletons simple. Its even easy to set up some function
forwarding so that static calls are transformed into non-staic calls:
<?php
// Requires PHP 5.3!
class Singleton {
public static function Instance() {
static $instances = array();
$class = get_called_class();
if (!array_key_exists($class, $instances)) {
$instances[$class] = new $class();
}
return $instances[$class];
}
public static function __callStatic($func, $args) {
$class = static::Instance();
return call_user_func_array(array($class, '__'.$func), $args);
}
}
class Earth extends Singleton {
public function __DoSomething($a, $b) {
return 15 + $this->SomethingElse($a, $b);
}
protected function SomethingElse($c, $d) {
return $c % $d;
}
}
echo Earth::DoSomething(6,27);
?>
----
Server IP: 208.69.120.35
Probable Submitter: 96.231.62.197
----
Manual Page -- http://www.php.net/manual/en/language.oop5.patterns.php
Edit -- https://master.php.net/note/edit/85582
Del: integrated -- https://master.php.net/note/delete/85582/integrated
Del: useless -- https://master.php.net/note/delete/85582/useless
Del: bad code -- https://master.php.net/note/delete/85582/bad+code
Del: spam -- https://master.php.net/note/delete/85582/spam
Del: non-english -- https://master.php.net/note/delete/85582/non-english
Del: in docs -- https://master.php.net/note/delete/85582/in+docs
Del: other reasons-- https://master.php.net/note/delete/85582
Reject -- https://master.php.net/note/reject/85582
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