Question

我是 PHP 面向对象编程的初学者。我想制作一个简单的计算器，我可以输入两个数字并根据我的function进行计算。我只能在 OOP 中输入两个数字作为参数。但我怎样才能输入两个<form>中的号码，并在<form>和variable之间建立连接并显示输出？作为我的初学者，请原谅我的错误。
谢谢你提前。

我到目前为止尝试的是：

index.php：

<?php 
  require 'functions.php';
?>

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8" >
    <title>PHP OOP | Calculator</title>
    <link href="style.css" rel="stylesheet" type="text/css">
</head>
<body>
 <div class="wrapper">
     <div class="form_area">
         <form action="" method="POST">
             <table>
                <tr>
                    <td>First Number :</td>
                    <td><input type="number" name="numOne" placeholder="Input Your First Number"></td>
                </tr>
                <tr>
                    <td>Second Number :</td>
                    <td><input type="number" name="numTwo" placeholder="Input Your Second Number"></td>
                </tr>
                <tr>
                    <td><input type="reset" name="reset" value="Reset"></td>
                    <td><input type="submit" name="submit" value="Calculate"></td>
                </tr>
            </table>
        </form>
    </div>
    <div class="output_area">
        <?php
            if(null !==($_POST['numOne'] && $_POST['numTwo'])){
                $resultsOne = new NumberCalculation();
                echo "Added Results = ".$resultsOne->add()."<br>";
            }
        ?>
      </div>
   </div>
  </body>
 </html>

functions.php：

<?php

class NumberCalculation{
public $numOne;
public $numTwo;

public function __construct($firstNum, $secNum){
    $this->numOne = $firstNum;
    $this->numTwo = $secNum;
}
public function add(){
    return $this->numOne + $this->numTwo;
}
public function subtruct(){
    return $this->numOne - $this->numTwo;   
}
public function multiple(){
    return $this->numOne * $this->numTwo;   
}
public function divide(){
    return $this->numOne / $this->numTwo;   
}
}
global $numOne, $numTwo;

$resultsOne = new NumberCalculation($numOne,$numTwo);
?>

Answer 1

你几乎拥有它。将您的$_POST变量输入到NumberCalculation类构造函数

$resultsOne = new NumberCalculation($_POST['numOne'],$_POST['numTwo']);
echo "Added Results = ".$resultsOne->add()."<br>";

如果您不想将某些内容传递给NumberCalculation类构造函数。你可以做ff：

$resultsOne = new NumberCalculation();
$resultsOne->numOne = $_POST['numOne'];
$resultsOne->numTwo = $_POST['numTwo'];
echo "Added Results = ".$resultsOne->add()."<br>";

Answer 2

您没有传递表单发布的值。这样做..

 conda install -c https://conda.anaconda.org/menpo opencv3

Answer 3

添加第三个参数（$funcName）以供全局使用。你只需要传递动作名称，例如add，multiple，divide等。

functions.php：

class NumberCalculation{
            public $numOne;
            public $numTwo;
            private $result;

                public function __construct($firstNum, $secNum, $funcName){
                    $this->numOne = $firstNum;
                    $this->numTwo = $secNum;
                    $this->$funcName();                 
                }
                public function add(){
                    $this->result = $this->numOne + $this->numTwo;
                }
                public function subtruct(){
                    $this->result = $this->numOne - $this->numTwo;   
                }
                public function multiple(){
                    $this->result = $this->numOne * $this->numTwo;   
                }
                public function divide(){
                    $this->result = $this->numOne / $this->numTwo;   
                }

                public function result(){
                    return $this->result;   
                }
         }



     $numOne=3; $numTwo=2; $funcName='multiple';
     $resultsOne = new NumberCalculation($numOne,$numTwo,$funcName);
     echo $resultsOne->result();

PHP OOP简单计算器制作

3 个答案: