Question

我正在尝试使用表单执行某些计算，但每次我尝试使用复选框时都会出错。

复选框以itselff形式设置为值1，如果选中或未检查则正在检查。

$verdieping = isset($_POST["verdieping"]) ? $_POST["verdieping"] : 0;  
$telefoon = isset($_POST["telefoon"]) ? $_POST["telefoon"] : 0;  
$netwerk = isset($_POST["netwerk"]) ? $_POST["netwerk"] : 0;

当我尝试进行计算时，每个作品都期望带有复选框的选项当选中两个复选框（telefoon和netwerk）时，该值应为30 如果只选择一个，则值应为20 但是没有其他的东西我试图写下它总是给出问题，它总是使用20，从来没有价值30.

我该如何解决这个问题？或者假设我写的语法都错误，无法为计算提供条件？任何意见都赞赏。

$standnaam = $_SESSION["standnaam"];
$oppervlakte = $_SESSION["oppervlakte"];
$verdieping = $_SESSION["verdieping"];
$telefoon = $_SESSION["telefoon"];
$netwerk = $_SESSION["netwerk"];


if ($oppervlakte <= 10)
$tarief = 100;

if ($oppervlakte > 10 && $oppervlakte <= 20)
$tarief = 90;

if ($oppervlakte > 20)
$tarief = 80;


if($verdieping == 1)
{
$prijsVerdieping = $oppervlakte * 120;
}
else
{
$prijsVerdieping = 0;
}

if(($telefoon == 1) && ($netwerk == 1))
{
$prijsCom = 30; // never get this value, it always uses 20
}

if(($telefoon == 1) || ($netwerk == 1))
{
$prijsCom = 20;
}

$prijsOpp = $tarief * $oppervlakte; // works
$totalePrijs = $prijsOpp + $prijsVerdieping + $prijsCom; //prijsCom value is always wrong

问候。

编辑：2个php文件中的完整代码

<?php
if (!empty($_POST))
{ 
$standnaam = $_POST["standnaam"];
$oppervlakte = $_POST["oppervlakte"];
//value in the form van checkboxes op 1 zetten!
$verdieping = isset($_POST["verdieping"]) ? $_POST["verdieping"] : 0;  //if checkbox checked     value 1 anders 0
$telefoon = isset($_POST["telefoon"]) ? $_POST["telefoon"] : 0;  
$netwerk = isset($_POST["netwerk"]) ? $_POST["netwerk"] : 0; 


if (is_numeric($oppervlakte)) 
{
    $_SESSION["standnaam"]=$standnaam;
    $_SESSION["oppervlakte"]=$oppervlakte;
    $_SESSION["verdieping"]=$verdieping;
    $_SESSION["telefoon"]=$telefoon;
    $_SESSION["netwerk"]=$netwerk;
    header("Location:ExpoOverzicht.php"); //verzenden naar ExpoOverzicht.php
}
else 
{
    echo "<h1>Foute gegevens, Opnieuw invullen a.u.b</h1>";
}  
}

?>

<form action="<?php echo $_SERVER["PHP_SELF"]; ?>" method="post" id="form1">
<h1>Vul de gegevens in</h1>
<table>
    <tr>
        <td>Standnaam:</td>
        <td><input type="text" name="standnaam" size="18"/></td>
    </tr>
    <tr>
        <td>Oppervlakte (in m^2):</td>
        <td><input type="text" name="oppervlakte" size="6"/></td>
    </tr>
    <tr>
        <td>Verdieping:</td>
        <td><input type="checkbox" name="verdieping" value="1"/></td>
        <!--value op 1 zetten voor checkbox! indien checked is value 1 -->
    </tr>
    <tr>
        <td>Telefoon:</td>
        <td><input type="checkbox" name="telefoon" value="1"/></td>
    </tr>
    <tr>
        <td>Netwerk:</td>
        <td><input type="checkbox" name="netwerk" value="1"/></td>
    </tr>
    <tr>
        <td><input type="submit" name="verzenden" value="Verzenden"/></td>
    </tr>
</table>

计算的第2页：

<?php

$standnaam = $_SESSION["standnaam"];
$oppervlakte = $_SESSION["oppervlakte"];
$verdieping = $_SESSION["verdieping"];
$telefoon = $_SESSION["telefoon"];
$netwerk = $_SESSION["netwerk"];


if ($oppervlakte <= 10)
$tarief = 100;

if ($oppervlakte > 10 && $oppervlakte <= 20)
$tarief = 90;

if ($oppervlakte > 20)
$tarief = 80;


if($verdieping == 1)
{
$prijsVerdieping = $oppervlakte * 120;
}
else
{
$prijsVerdieping = 0;
}

if(($telefoon == 1) && ($netwerk == 1))
{
$prijsCom = 30;
}

 if(($telefoon == 1) || ($netwerk == 1))
{
$prijsCom = 20;
}

$prijsOpp = $tarief * $oppervlakte; // werkt
$totalePrijs = $prijsOpp + $prijsVerdieping + $prijsCom; 

echo "<table class=\"tableExpo\">";

echo "<th>Standnaam</th>";
echo "<th>Oppervlakte</th>";
echo "<th>Verdieping</th>";
echo "<th>Telefoon</th>";
echo "<th>Netwerk</th>";
echo "<th>Totale prijs</th>";

    echo "<tr>";

        echo "<td>$standnaam</td>";
        echo "<td>$oppervlakte</td>";
        echo "<td>$verdieping</td>";
        echo "<td>$telefoon</td>";
        echo "<td>$netwerk</td>";
        echo "<td>$totalePrijs</td>";

    echo "</tr>";

echo "</table>";

?>

<a href="ExpoFormulier.php">Terug naar het formulier</a>

</body>
</html>

Answer 1

我注意到的一个问题是这些行，

if(($telefoon == 1) && ($netwerk == 1))  {
$prijsCom = 30; // will get set to 30.
}

if(($telefoon == 1) || ($netwerk == 1))  {
$prijsCom = 20; // will now be set to value of 20.
}

原因如果$telefoon和$netwerk同时为1，$prijsCom设置为30的值。它留下if阻塞并下到下一个，即

if(($telefoon == 1) || ($netwerk == 1))  {
    $prijsCom = 20;
}

评估结果为true，因为$telefoon == 1评估为true，并会将$prijsCom的值覆盖为20。

根据代码的使用方式，作为可能的解决方法，您可以先添加||条件，因此值设置为20 $telefoon或{ {1}}设置为$netwerk，然后检查它们是否均为1。

更新

查看代码时，我注意到您使用的是1个变量，但是您没有在文件开头调用$_SESSION，

session_start()

这可能是您的其他问题所在，也可能不是，但无论何时使用<?php session_start(); // <--you need to call this first $standnaam = $_SESSION["standnaam"]; $oppervlakte = $_SESSION["oppervlakte"]; ...，您都需要先致电$_SESSION。

Answer 2

在session_start();之后致电<?php。

PHP表单复选框计算

2 个答案:

更新