Question

我正在尝试为我正在构建的简单拍卖网站创建高级搜索系统。我希望有一个“Mozilla Thunderbird”＃39;样式搜索系统，如果在表单中选择了某个选项，则会出现另一个表单，其中包含特定的选择选项，以便进行更窄的搜索。

对于那些不熟悉搜索系统的人，我已经附上了一张图片，希望有助于提供一些背景信息：

这是我到目前为止的代码：

<html>
<body>

<?php {

$servername = "";
$username = "";
$password = "";
$dbname ="";

$conn = new mysqli($servername, $username, $password, $dbname);

if($conn->connect_error) {
    die("connection failed: " . $conn->connect_error);
}

$sql = "SELECT DISTINCT `category` FROM `iBayItems`";
$Category = $conn->query($sql);

if($Category->num_rows > 0) {


echo "<h2>Advanced Search</h2>
          <p>Searching for items where: </p>";

    /*First parameters*/
    echo "<form action='TestAdvanced.php' method='POST'>
        <select name='advancedSearch'>
            <option value=''>Select Search...</option>
            <option value='TitleSearch'>Title</option>
            <option value='CategorySearch'>Category</option>
            <option value='PriceSearch'>Price</option>
            <option value='AddressSearch'>Address</option>
            <option value='TimeLeftSearch'>Time Left</option>
        </select>
    </form>";

    (isset($_POST["advancedSearch"])) ? $searchOption = $_POST["advancedSearch"] : $searchOption="";

    /*Operators for first parameters*/
    /*Title Operators*/
    if ($searchOption == '') {
    } else if ($searchOption == 'TitleSearch') {
    echo "<form>
        <select name='TitleOperators'>
            <option value=''>Select Operator...</option>
            <option value='LIKE'>is</option>
            <option value='NOT LIKE'>is not</option>
        </select>
    </form>";

    echo "<form>
        <input type='text' required pattern='[A-Za-z0-9]{0,42}' name='Title'>
    </form>"; 
    } else if($searchOption == 'CategorySearch') {

    /*Category Operators*/
    echo "<form>
        <select name='CategoryOperators'>
            <option value=''>Select Operator...</option>
            <option value='LIKE'>is</option>
            <option value='NOT LIKE'>is not</option>
        </select>
    </form>";

    echo "<form>
        <select name='Category'>
            <option value=''>Select Category...</option>";
                while($row = $Category->fetch_assoc()) {
                    echo "<option value='";
                        echo $row["category"];
                    echo "' required>";
                    echo $row["category"];
        echo "</option>";
                }
    echo "</select>
    </form>";
    } else if($searchOption == 'PriceSearch') {

    /*Price Operators*/
    echo "<form>
        <select name='PriceOperators'>
            <option value=''>Select Operator...</option>
            <option value='='>equals</option>
            <option value='<='>less than or equal to</option>
            <option value='>='>greater than or equal to</option>
            <option value='<'>less than</option>
            <option value='>'>greater than</option>
        </select>
    </form>";

    echo "<form>
        <input type='number' required name='price' min='0' step='0.01'>
    </form>";
    } else if($searchOption == 'AddressSearch') {

    /*Address Operators*/
    echo "<form>
        <select name='AddressOperators'>
            <option value=''>Select Operator...</option>
            <option value='LIKE'>near to</option>
            <option value='NOT LIKE'>not near</option>
        </select>
    </form>";

    echo "<form>
        <input type='text' placeholder='E.g. NR18 9JJ' required name='postcode' pattern='[A-Za-z0-9]{0,42}'>
    </form>";
    } else if($searchOption == 'TimeLeftSearch') {

    /*Time Operators*/
    echo "<form>
        <select name='TimeOperators'>
            <option value=''>Select Operator...</option>
            <option value='='>equals</option>
            <option value='<='>less than or equal to</option>
            <option value='>='>greater than or equal to</option>
            <option value='<'>less than</option>
            <option value='>'>greater than</option>
        </select>
    </form>";

    echo "<form>
        <input type='number' required name='days' min='0' step='1'>
        <p> days</p>
    </form>";
    } ?>
</body>
</html>

我遇到的问题是让二级表格出现，我尝试使用＆＃34; noscript＆＃34;使用提交表单，但这并不是我真正需要的，因为我不希望每次选择一个选项时页面都会重新加载。

我对PHP很陌生，所以我试图通过研究，理解HTML和编码实践以及盲目运气来尽我所能。

到目前为止，我已使用这些链接来帮助我：

Using $_POST to get select option value from HTML

http://www.vasiljevski.com/blog/2012/01/17/how-to-set-the-selected-option-of-select-tag-from-the-php/

但是这些只是让我到目前为止。

从图片中可以看出，Thunderbird允许您进行多次搜索，在我解决了当前的问题后，我想自己实现这一点。

你能提供的任何帮助绝对太棒了！

亚历

选择上一个表单中的某个选项时，将显示表单 - PHP

0 个答案: