/**
    * Interface Strategy 抽象策略类
    */

    interface Strategy{
        public function computePrice($price);
    }

    /**
    * Class Genernal 具体策略类
    */

    class Genernal implements Strategy{

        public function computePrice($price)
        {
            // TODO: Implement computePrice() method.
            return $price;
        }
    }

    class Middle implements Strategy{

        public function computePrice($price)
        {
            // TODO: Implement computePrice() method.
            return $price * 0.8;
        }
    }

    class High implements Strategy{

        public function computePrice($price)
        {
            // TODO: Implement computePrice() method.
            return $price * 0.5;
        }
    }

    /**
    * Class Price 环境实现类
    */

    class Price{
        // 具体策略对象
        private $strategyInstance;
        // 构造函数
        public function __construct($instance){
            $this->strategyInstance = $instance;
        }

        public function compute($price){
            return $this->strategyInstance->computePrice($price);
        }
    }

    $p = new Price(new High());

    $total = $p->compute(100);

var PriceStrategy = function()
{
        var stragtegy = {
            return30 : function(price)
            {
                return price + parseInt(price/100)*30;
            },
            return50 : function(price)
            {
                return price + parseInt(price/100)*50;
            },
            percent90 : function(price)
            {
                return price*100*90/10000;
            },
            percent80 : function(price)
            {
                return price*100*80/10000;
            },
            percent50 : function(price)
            {
                return price*100*50/10000;
            }
        };
        return function(alg,price)
        {
            return stragtegy[alg] && stragtegy[alg](price);
        }
}();
var price = PriceStrategy('return50','200');

var InputStrategy = function()
{
    var strategy = {
            notNull : function(value)
            {
                    return /\s+/.test(value)?'请输入内容':'';
            },
            number : function(value)
            {
                    return /^[0-9]+(\.[0-9]+)?$/.test(value) ? '' : '请输入数字';
            },
            phone : function()
            {
                    return /^d{3}\-\d{8}$\d{4}\-\d{7}$/.test(value) ? '' : '请输入正确的电话号码格式，如010-12345678';
            }
    }
    return {
        check : function(type,value)
        {
                value = value.replace(/^s+|\s+$/,'');
                return strategy[type] ? strategy[type](value) : '没有该类型的检测方法'
        },
        //添加策略
        addStrategy : function(type,fn)
        {
                strategy[type] = fn;
        }
    }
}();
InputStrategy.addStrategy('nickname',function(value){
        return /^[a-zA-z]\w{3,7}$/.test(value) ? '' : '请输入4-8位昵称';
});