php

Question

我在 html 中创建了一个表单。在这种形式中，您可以指定操作系统。表格如下所示：

<input type="hidden" name="toshibaproduct" value="001"/>
<input type="hidden" name="toshibamerk" value="toshiba"/>
<input type="hidden" name="toshibamodel" value="Sattelite A100-510"/>
Operating system <select name="beschikbaarheid" value="true">
    <option value="xp">Windows XP</option>
    <option value="vista">Windows Vista</option>
    <option value="linux">Linux</option>
</select>
Aantal: <input type="text" size=2 maxlength=3 name="toshibaaantal" value="0"/>
<input type="hidden" name="toshibaprijs" value="999.99"/>
<input type="image" src="bestel.jpg" border=0 value="bestellen"/>

我还创建了一个外部函数，我将其包含在页面中，如下所示：

<?php
function beschikbaarheid($merk, $os)
{
    $beschikbaar = array(
        "Toshiba" => array("xp" => true, "vista" => false, "linux" => true),
        "Acer" => array("xp" => true, "vista" => true, "linux" => true),
        "Hp" => array("xp" => true, "vista" => false, "linux" => true));
    return ($beschikbaar[$merk][$os]);
}
?>

我的计划是让表单在外部函数中检查操作系统是否可用，如果不可用，return 会显示一条消息，说明它已售罄。如果它可用，它应该继续脚本的其余部分（顺便说一下，它可以工作，但它不包括在这里）。

问题是，我不知道如何让表单检查外部函数中的数组。我还想知道在外部函数中只检查操作系统是否有问题，而不是其他形式，例如数量。

Answer 1

如果您需要在提交表单之前进行检查，请尝试编写 JavaScript 或 jQuery 函数。否则，您可以在提交数据的页面中调用该函数。然后您可以验证该字段并生成响应。

Answer 2

例如，如果您有一个包含可用操作系统列表的 JSON 文件，您可以使用它来对照列表检查选择。

`os.json`
[
    "Windows Vista", "Windows XP", "OSX", "Linux"
]

some other PHP file
<?php
function is_os_available($os) {
    return in_array($os, json_decode(file_get_contents('os.json')));
}

希望这对您有所帮助，
肖恩

Answer 3

已更新HTML

<head>
    <!-- include jQuery -->
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
</head>

<input type="hidden" name="toshibaproduct" value="001" />
<input type="hidden" name="toshibamerk" value="toshiba" />
<input type="hidden" name="toshibamodel" value="Sattelite A100-510" />
Maker
<select name="maker" value="true" id="maker">
    <option value="toshiba">Toshiba</option>
    <option value="acer">Acer</option>
    <option value="hp">Hp</option>
</select>
Operating system 
<select name="beschikbaarheid" value="true" id="operationSystem">
    <option value="xp">Windows XP</option>
    <option value="vista">Windows Vista</option>
    <option value="linux">Linux</option>
</select>
Aantal: <input type="text" size=2 maxlength=3 name="toshibaaantal" id="quantity" value="0" />
<input type="hidden" name="toshibaprijs" value="999.99" />
<input type="button" value="bestellen" id="submitData" />

<span id="messages"></span>

Ajax

<!-- Ajax -->
<script type="text/javascript">
$('#submitData').click(function(){
    var selectedOs = $('#operationSystem').find('option:selected').val();
    var selectedMaker = $('#maker').find('option:selected').val();
    var selectedQuantity = $('#quantity').val();
    if(selectedQuantity == 0 || selectedQuantity == ''){
        $('#messages').text('Please provide valid information');
        return false;
    }
   // You can perform an ajax request using the .ajax() method
    $.ajax({
        type: 'POST',
        url: 'beschikbaarheid.php', // This is the url that will be requested
        data: {operation_system: selectedOs, maker: selectedMaker, quantity: selectedQuantity},
        success: function(data){ 
            if(data){
                $('#messages').text('Available');
            }else{
                $('#messages').text('Not available');
            }
        },
    });

});
</script>

服务器端脚本(beschikbaarheid.php)

<?php
if(isset( $_POST['quantity'] )) {
    $operatingSystem  = $_POST['operation_system'];
    $maker  = $_POST['maker'];
    $quantity  = $_POST['quantity'];
    echo beschikbaarheid($operatingSystem, $maker, $quantity);
}
function beschikbaarheid($operatingSystem, $maker, $quantity)
{
    // I did't used the quantity section
    // Please use it if needed
    // Also this structure is not much prefered, I just used this becasuse you might have some out put like this.
    $beschikbaar = array(
        "toshiba" => array ("xp" =>false, "vista" => false, "linux" => true), 
        "hp" => array ("xp" =>true, "vista" => false, "linux" => true),
        "acer" => array ("xp" =>true, "vista" => false, "linux" => true)
    ); 
    return $beschikbaar[$maker][$operatingSystem];
}
?>

有多种方法可以实现这一点，希望对您有所帮助。

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