PHP calculator instance based on factory mode

This article mainly introduces the calculator implemented by PHP based on the factory mode. The example analyzes the implementation principle and application skills of the php factory mode, which has some reference value, if you need a calculator, refer to the example in this article to describe the calculator based on the factory mode of PHP. Share it with you for your reference. The details are as follows:

abstract class Calculator{ private $number1; private $number2; public $result; /**  * @return the $number2  */ public function getNumber2() {  return $this->number2; } /**  * @param field_type $number2  */ public function setNumber2($number2) {  $this->number2 = $number2; } /**  * @return the $number1  */ public function getNumber1() {  return $this->number1; } /**  * @param field_type $number1  */ public function setNumber1($number1) {  $this->number1 = $number1; } abstract function get_result(); }class Add extends Calculator{  public function get_result($number1,$number2)  {   return $number1+$number2;  }}class Sub extends Calculator{  public function get_result($number1,$number2)  {   return $number1-$number2;  }}class Mul extends Calculator{  public function get_result($number1,$number2)  {   return $number1*$number2;  }}class Div extends Calculator{  public function get_result($number1,$number2)  {   return $number1/$number2;  }}class Factory{  public function Building($notes)  {   if($notes=="+")   {    $add=new Add();    return $add;   }   elseif ($notes=="-")   {    $sub=new Sub();    return $sub;   }   elseif($notes=="*")   {    $mul=new Mul();    return $mul;   }   else   {    $p=new Div();    return $p;   }  }}

I hope this article will help you with php programming.