PHP策略设计模式

'; } } /** * 具体策略角色B */ class ConcreteStrategyB implements Strategy { public function algorithmInterface() { echo 'algorithmInterface B
'; } } /** * 具体策略角色C */ class ConcreteStrategyC implements Strategy { public function algorithmInterface() { echo 'algorithmInterface C
'; } } /** * 环境角色 */ class Context { /* 引用的策略 */ private $_strategy; public function __construct(Strategy $strategy) { $this->_strategy = $strategy; } public function contextInterface() { $this->_strategy->algorithmInterface(); } } /** * 客户端 */ class Client { /** * Main program. */ public static function main() { $strategyA = new ConcreteStrategyA(); $context = new Context($strategyA); $context->contextInterface(); $strategyB = new ConcreteStrategyB(); $context = new Context($strategyB); $context->contextInterface(); $strategyC = new ConcreteStrategyC(); $context = new Context($strategyC); $context->contextInterface(); } } Client::main(); ?>

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