PHP多例模式介绍

abstract class Multiton {
private static $instances = array();
public static function getInstance() {
$key = get_called_class() . serialize(func_get_args());
if (!isset(self::$instances[$key])) {
$rc = new ReflectionClass(get_called_class());
self::$instances[$key] = $rc->newInstanceArgs(func_get_args());
}
return self::$instances[$key];
}
} class Hello extends Multiton {
public function __construct($string = 'World') {
echo "Hello $stringn";
}
} class GoodBye extends Multiton {
public function __construct($string = 'my',$string2 = 'darling') {
echo "Goodbye $string $string2n";
}
} $a = Hello::getInstance('World');
$b = Hello::getInstance('bob');
// $a !== $b $c = Hello::getInstance('World');
// $a === $c $d = GoodBye::getInstance();
$e = GoodBye::getInstance();
// $d === $e $f = GoodBye::getInstance('your');
// $d !== $f
?>