PHP完整搜索表单，包含选择字段

Question

将此问题解决了三天以上。

我正在创建一个允许用户搜索某些条件的表单。

为什么使用get方法时公司和类别的值没有传递给网址？

<form class="main-searchbox-container" role="search" method="get" action="search-results.php">
      <div class="form-group" id="main-searchbox">
           <input id="target" type="text" class="form-control main-search-input" placeholder="Search..." name="target" value="<?php if (isset($_POST['target'])) echo $_POST['target']; ?>" />
      </div>
      <div class="selection-container">
           <select name="company" class="header-selection" form="main-searchbox">
                   <option value="company" name="company">Company</option>
           </select>
      </div>
      <div class="selection-container">
           <select name="category" class="header-selection" form="main-searchbox">
                   <?php 
                    // Make the query:
                    $sql = "select Business_Category from business_categories order by Business_Category ASC";
                    $result = mysqli_query($conn, $sql);
                    if (mysqli_num_rows($result) > 0) {
                    // output data of each row
                       while ($row = mysqli_fetch_assoc($result)) {
                                      echo '<option value="'.$row['Business_Category'].'" name="'.$row['Business_Category'].'">'.$row['Business_Category'].'</option>';
                       }
                    } else { echo "----";} // End
                              ?>         
            </select>
        </div>
        <input id="submit" class="btn btn-default main-search-button" type="submit" name="submit" value="Search">
 </form>

解决此问题必须非常简单，并且您的反馈可以更轻松地解决这个问题。

感谢您的时间。

Answer 1

通过删除两个form="main-searchbox"元素（<select>中）中的<div class="selection-container">来起作用，因为<form>上没有与该名称匹配的ID，例如{ {3}}在评论中说。

请参见工作代码：

<form class="main-searchbox-container" role="search" method="get" action="search-results.php">
    <div class="form-group" id="main-searchbox">
        <input id="target" type="text" class="form-control main-search-input" placeholder="Search..." name="target" value="<?php if (isset($_POST['target'])) echo $_POST['target']; ?>" />
    </div>
    <div class="selection-container">
        <select name="company" class="header-selection">
            <option value="company" name="company">Company</option>
        </select>
    </div>
    <div class="selection-container">
        <select name="category" class="header-selection">
            <?php 
                 // Make the query:
                 $sql = "select Business_Category from business_categories order by Business_Category ASC";
                 $result = mysqli_query($conn, $sql);
                 if (mysqli_num_rows($result) > 0) {
                     // output data of each row
                     while ($row = mysqli_fetch_assoc($result)) {
                         echo '<option value="'.$row['Business_Category'].'" name="'.$row['Business_Category'].'">'.$row['Business_Category'].'</option>';
                     }
                 } else { echo "----";} // End
            ?>         
            </select>
        </div>
        <input id="submit" class="btn btn-default main-search-button" type="submit" name="submit" value="Search">
 </form>