PHP设计模式---策略模式

<?php
/**
 * 抽象策略模式
 */
interface Strategy
{
    public function AlgorithmInterface();
}
/**
 * 具体策略模式
 */
class ConcreteStrategyA implements Strategy
{
    public function AlgorithmInterface()
    {
        var_dump(‘A实现‘);
    }
}
class ConcreteStrategyB implements Strategy
{
    public function AlgorithmInterface()
    {
        var_dump(‘B实现‘);
    }
}
class ConcreteStrategyC implements Stratergy
{
    public function AlgorithmInterface()
    {
        var_dump(‘C实现‘);
    }
}
/**
 * 客户环境类
 */
class Context
{
    public function __contruct($stratergy)
    {
        $this->stratergy=$$stratergy;
    }
    public function contextInterface()
    {
        $this->stratergy->AlgorithmInterface();
    }
}
$a = new Context(new ConcreteStrategyA());
$a->contextInterface();