php面向对象中的常见魔术方法使用代码说明汇总

class Device {
   public function  construct(Battery $battery, $name) {
       $this->battery = $battery;
       $this->name = $name;
       $this->connect();
    }
}

class Device {
    public function  get($name) {
         if(array_key_exists($name, $this->data)) {
            return $this->data[$name];
        }
        return null;
    }
}

class Battery {
    private $charge = 0;
 
    public function  get($name) {
        if(isset($this->$name)) {
            return $this->$name;
        }
        return null;
    }
}

class Device {
    public function  set($name, $value) {
        // use the property name as the array key
        $this->data[$name] = $value;
    }
}

class Device {
    public function  isset($name) {
        return array_key_exists($name, $this->data);
    }
}

class Device {
    public function  toString() {
       $connected = (isset($this->connection)) ? 'connected' : 'disconnected';
       $count = count($this->data);
       return $this->name . ' is ' . $connected . ' with ' . $count . ' items in memory' . PHP_EOL;
    }
    ...
}

class Battery {
    //...
    public static function  set_state(array $array) {
        $obj = new self();
        $obj->setCharge($array['charge']);
        return $obj;
    }
    //...
}

$device = new Device(new Battery(), 'iMagic');
$device2 = clone $device;
 
$device->battery->setCharge(65);
echo $device2->battery->charge;
// 65

class Device {
    ...
    public function  clone() {
        // copy our Battery object
        $this->battery = clone $this->battery;
    }
    ...
}

class Device {
    public $name;           
    public $battery;       
    public $data = array();
    public $connection;    
    //...
    public function  sleep() {
        return array('name', 'battery', 'data');
    }
    //...
}

class Device {
    //...
    public function  wakeup() {
        // reconnect to the network
        $this->connect();
    }
    //...
}

class Device {
    //...
    public function  call($name, $arguments) {
        // make sure our child object has this method
        if(method_exists($this->connection, $name)) {
            // forward the call to our child object
            return call_user_func_array(array($this->connection, $name), $arguments);
        }
        return null;
    }
    //...
}

class Device {
    //...
    public static function  callStatic($name, $arguments) {
        // make sure our class has this method
        if(method_exists('Connection', $name)) {
            // forward the static call to our class
            return call_user_func_array(array('Connection', $name), $arguments);
        }
        return null;
    }
    //...
}