PHP多例模式

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学习java就知道设计模式中有多例模式:

1、多例类可以有多个实例
2、多例类必须能够自我创建并管理自己的实例,并向外界提供自己的实例。

大家都知道PHP单例模式,却很少说PHP多例模式,下面是在wikipedia上看到的PHP多例模式的例子:

<?phpabstract class Multiton {    /** by http://www.phpddt.com */    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 $string\n";    }} class GoodBye extends Multiton {    public function __construct($string = 'my', $string2 = 'darling') {        echo "Goodbye $string $string2\n";    }} $a = Hello::getInstance('World');$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 ?>

 


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