$value){ $this-$name=$value; } abstract function getResult(); } //加法 class Add extends Operation{ public function getResult(){ return $this-num1+$this-num2; } } //减法 class Sub extends Operation{ public function getResult(){ return $this-num1-$this-num2; } } //乘法 class Mul extends Operation{ public function getResult(){ return $thi-num1*$this-num2; } } //除法 class Div extends Operation{ public function getResult(){ if($this-num2==0){ echo 除数不能为零; return false; } return $this-num1/$this-num2; } } //运算符操作工厂。

复制代码 代码示例: ?php //运算符抽象类 abstract class Operation{ private $num1=0; private $num2=0; public function __get($name){ if(isset($this-$name)){ return $this-$name; } return null; } public function __set($name， 例子，来决定初始化哪个类 class OperationFactory{ static function createOperation($operate){ switch($operate){ case +: $oper=new Add(); break; case -: $oper=new Sub(); break; case *: $oper=new Mul(); break; case /: $oper=new Div(); } return $oper; } } //开始测试 $oper=OperationFactory::createOperation(+); $oper-num1=3; $oper-num2=6; $result=$oper-getResult(); echo $result; ? 。

php工厂模式实例代码，。