Question

我想制作一个基本的计算器。每件事都设置了，文本框和按钮。它需要是OOP，但这给我带来了麻烦。它之前有效，直到我尝试在OOP中完成。

我没有得到错误，但是当我试图让代码计算一个总和时，它会将答案结果为0.这可能是因为该类没有从文本框中获取值，但我不知道如何解决它。

需要计算的类的代码：

class CountUp
{
    public static $_sum;
    public static $number1;
    public static $number2;

    public function __construct()
    {
            self::$_sum;
            self::$number1;
            self::$number2;
    }

    public function getnumber1()
    {    
    self::$number1 = ($_POST['number1']);
    return self::$number1;
    }

    public function getnumber2()
    {
    self::$number2 = ($_POST['number2']);
    return self::$number2;
    }

    public static function getsum()
    {
    $_sum = self::$number1 + self::$number2;
    return $_sum;
    }
}

对不起，如果这是一个愚蠢的问题，我对php很不好。

编辑：这是值来自的地方：

<html>
    <head>
    </head>
    <body>
        <form name ="btw calculate" method="post" action="test2.php"><br/>
        enter a number <br/>
        <input type="tekst" name="number1" value=""><br/>
        <input type="submit" name="plus" value="+">
        <input type="submit" name="retract"  value="- "><br/>
        <input type="submit" name="divide" value="/ ">
        <input type="submit" name="multiply" value="* "><br/>
        enter a second number <br/>
        <input type="tekst" name="number2" value=""><br/>
        </form>
    </body>
</html>

EDIT2：我是个白痴，忘了将这部分添加到这个问题中：

<?php
include("plus.class.php");

if ($_SERVER['REQUEST_METHOD'] == 'POST')
{
    if (isset($_POST['plus']))
    {
        echo CountUp::getSum();
    }

    else
    {
        //still empty for now
    }
}
?>

Answer 1

您正在混合与类定义相关的静态函数。

对象实例函数，它们与您创建的类的每个“新”实例相关。

这里输入表单和类将$ _POST数组值一起添加。

<?php if (!empty($_POST['number1'])) {

// object instance version
class CountUp
{
    private $number1 = 0;
    private $number2 = 0;


    public function setNumber1($number)
    {
        $this->number1 = $number;
    }

    public function setNumber2($number)
    {
        $this->number2 = ($number)

    public function getSum()
    {
        $_sum = $this->number1 + $this->number2;
        return $_sum;
    }
}

    $addTwoNumbers1 = new CountUp();
    $addTwoNumbers1->setNumber1($_POST['number1']);
    $addTwoNumbers1->setNumber2($_POST['number2']);
    ?>
    <p> The answer of: <?= $_POST['number1']?> + <?= $_POST['number2'] ?> = <?= $addTwoNumbers1->getSum(); ?>
    <?php
}
?>
<html>
    <head>
    </head>
    <body>
        <form name ="btw calculate" method="post" action=""><br/>
        enter a number <br/>
        <input type="text" name="number1" value=""><br/>
        <p>will be added to...</p>
        enter a second number <br/>
        <input type="text" name="number2" value=""><br/>
        <input type="submit" name="plus" value="add the two numbers together...">
        </form>
    </body>
</html>

无法从文本框到类获取值

1 个答案: