Question

嘿所以我正在制作一个快速的PHP程序，允许简单的数学计算。而不是让输出转到_POST的不同页面，我希望它们都能转到同一页面。所以我尝试使用一个函数来查看_POST数据并区分输入并根据输入运行不同的函数。

知道我做错了什么？

<h1>Add:</h1>
    <form action="result.php" method="post">
    #1: <input type="text" name="a1"><br>
    #2: <input type="text" name="a2"><br>
    <input type="hidden" name="action" value="add">
    <input type="submit" name="addsubmit">
    </form>
<hr />
<h1>Subtract:</h1>
    <form action="result.php" method="post">
    #1: <input type="text" name="s1"><br>
    #2: <input type="text" name="s2"><br>
    <input type="hidden" name="action" value="subtract">
    <input type="submit" name="subsubmit">
    </form>
<hr />
<h1>Multiply:</h1>
    <form action="result.php" method="post">
    #1: <input type="text" name="m1"><br>
    #2: <input type="text" name="m2"><br>
    <input type="hidden" name="action" value="multiply">
    <input type="submit" name="multisubmit">
    </form>
<hr />
<h1>Divide:</h1>
    <form action="result.php" method="post">
    #1: <input type="text" name="d1"><br>
    #2: <input type="text" name="d2"><br>
    <input type="hidden" name="action" value="divide">
    <input type="submit" name="divsubmit">
    </form>



</body>

~~~

<?php



$a1 = $_POST["a1"];
$a2 = $_POST["a2"];
$s1 = $_POST["s1"];
$s2 = $_POST["s2"];
$m1 = $_POST["m1"];
$m2 = $_POST["m2"];
$d1 = $_POST["d1"];
$d2  = $_POST["d2"];


function add($num1, $num2){
    echo $num1 + $num2;
}

function subtract($num1, $num2){
    echo $num1 - $num2; 
}

function multiply($num1, $num2){
    echo $num1 * $num2;
}

function divide($num1, $num2){
    echo $num1 / $num2;
}

function operate(){


    switch($_POST['submit']) {
        case 'addsubmit':
            add($a1, $a2);
            break;
        case 'subsubmit':
            subtract($s1, $s2);
            break;
        case 'multisubmit':
            multiply($m1, $m2);
            break;
        case 'divsubmit':
            divide($d1, $d2);
            break;
    }

}



?>

    <div id="1">
        <h1>Addition:</h1>
        Your answer is <?php echo operate(); ?><br />
        <hr />
    </div>

    <div id="2">
        <h1>Subtraction:</h1>
        Your answer is <?php echo operate(); ?><br />
        <hr />
    </div>

    <div id="3">
        <h1>Multiplication:</h1>
        Your answer is <?php echo operate(); ?><br />
        <hr />
    </div>

    <div id="4">
        <h1>Division:</h1>
        Your answer is <?php echo operate(); ?><br />
    </div>

    <button> <a href="/workspaces/testgrounds/addition.php">Back to main page</a></button>
</body>

~~ EDIT1：

First Errors || Second Errors -

Answer 1

<?php

$a1 = $_POST["a1"];
$a2 = $_POST["a2"];
$s1 = $_POST["s1"];
$s2 = $_POST["s2"];
$m1 = $_POST["m1"];
$m2 = $_POST["m2"];
$d1 = $_POST["d1"];
$d2  = $_POST["d2"];


function add($num1, $num2){
    return $num1 + $num2;
}

function subtract($num1, $num2){
    return $num1 - $num2; 
}

function multiply($num1, $num2){
    return $num1 * $num2;
}

function divide($num1, $num2){
    return $num1 / $num2;
}

 function operate() {

    switch($_POST['action']) {
        case 'add':
            return add($a1, $a2);
            break;
        case 'subtract':
            return subtract($s1, $s2);
            break;
        case 'multiply':
            return multiply($m1, $m2);
            break;
        case 'divide':
            return divide($d1, $d2);
            break;
    }
}

?>

    <div id="1">
        <h1>Addition:</h1>
        Your answer is <?php echo operate(); ?><br />
        <hr />
    </div>

    <div id="2">
        <h1>Subtraction:</h1>
        Your answer is <?php echo operate(); ?><br />
        <hr />
    </div>

    <div id="3">
        <h1>Multiplication:</h1>
        Your answer is <?php echo operate(); ?><br />
        <hr />
    </div>

    <div id="4">
        <h1>Division:</h1>
        Your answer is <?php echo operate(); ?><br />
    </div>

    <button> <a href="/workspaces/testgrounds/addition.php">Back to main page</a></button>
</body>

你也应该在开头为你的变量赋值添加一些isset（）测试。

切换案例和$ _POST的PHP问题

1 个答案: