ArrayAccess接口介绍

interface ArrayAccess
boolean offsetExists($index)
mixed offsetGet($index)
void offsetSet($index, $newvalue)
void offsetUnset($index)

//Configuration Class class Configuration implements ArrayAccess {    static private $config;    private $configarray;    private function __construct()    {        // init        $this->configarray = array("Binzy"=>"Male", "Jasmin"=>"Female");    }    public static function instance()    {        //        if (self::$config == null)        {            self::$config = new Configuration();        }        return self::$config;    }    function offsetExists($index)    {        return isset($this->configarray[$index]);    }    function offsetGet($index) {        return $this->configarray[$index];    }    function offsetSet($index, $newvalue) {        $this->configarray[$index] = $newvalue;    }    function offsetUnset($index) {        unset($this->configarray[$index]);    } } $config = Configuration::instance(); print $config["Binzy"];

$config = Configuration::instance(); print $config["Binzy"]; $config['Jasmin'] = "Binzy's Lover"; // config 2 $config2 = Configuration::instance(); print $config2['Jasmin'];