PHP和HTML搜索引擎定制

Question

我正在尝试让用户对他们希望搜索在其他方面进行排序以便于搜索，我正在寻找合适的方法将他们的选项（排序）传递给服务器。

这是我的html脚本

<form action="searchresult.php" method="post" id="searchengine" >
    <div class="input-group" style="box-shadow: 0px 0px 15px 5px orange;border-radius: 20px">
        <div class="input-group-btn">
            <button  class="btn  dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false" style="height: 35px;background-color:orange;color: white"><span class="fa fa-arrow-down"></span></button>
            <ul name="searchmethod" class="dropdown-menu" style="background-color: orange;border:5px solid orange;margin-top: 10px;border-radius: 20px;padding:10px 5px;">
                <li role="separator" class="divider"></li>
                <li><input type="button" readonly="" style="padding:2px 4px;margin:2px 6px;height:26px;background-color: gold;width:270px;border:0px" class="btn" value="Search By Reviewee's Name"></li>
                <li><input type="button" readonly="" style="padding:2px 4px;margin:5px 6px;height:26px;background-color: gold;width:270px" class="btn" value="Search By Reviewee's Website"></li>
                <li><input type="button" readonly="" style="padding:2px 4px;margin:2px 6px;height:26px;background-color: gold;width:270px" class="btn" value="Search By Reviewer's Name"></li>

                <li><input type="button" readonly="" style="padding:2px 4px;margin:2px 6px;height:26px;background-color: gold;width:270px" class="btn" value="Search By Review Date"></li>
                <hr>

            </ul>
        </div>
        <input type="text" class="form-control" name="word" style="width:190px;height:35px;background-color: #f3f558;font-size: 13px;color: black;padding-left:20px;padding-right:20px;text-align:center;font-family: cursive;" maxlength="40" required="" id="word" placeholder="Start Searching..." pattern="[a-Z0-9.,\']+" >

        <span  class="input-group-btn">
            <button class="btn" style="height: 35px;background-color:orange;color: white"  type="submit"><i class="glyphicon glyphicon-search"></i></button>
        </span>
    </div>

</form>

，这是我的PHP脚本

<?php
//checks if the word and buttun are both available
if (!isset($_POST['word'])) {
    die('get outta here');
}
//catches the word and stored in variable word

$word = sanitizeString($_POST['word']);
$_SESSION['recentsearch'] = $word;
$length = strlen($word);
if ($length <= 5) {
    $newlength = ' ' . 'your search is too short, try a longer word ';
} elseif ($length > 5) {
    $newlength = "";
}

if (isset($_POST['searchmethod'])) {
    $searchMethod = $_POST['searchmethod'];
    switch ($searchMethod) {
        case "Search By Reviewee's Name":
            $title = "Reviewee's name";
            $searchMethod = 'reviewName';
            break;

        case "Search By Reviewee's Website":
            $searchMethod = 'reviewLink';
            $title = "Reviewee's Website Link ";
            break;
        case "Search By Reviewer's Name":
            $searchMethod = 'reviewBy';
            $title = "Reviewer's name ";
            break;
        case "Search By Review Date":
            $searchMethod = 'reviewDate';
            $title = "Review Date ";
            break;

        default:
            $searchMethod = 'reviewName';
            break;
    }
} elseif (!isset($_POST['searchmethod'])) {
    $searchMethod = 'reviewName';
    $title = "Reviewee's name";
}

$search_exploded = explode(" ", $word);
$x = 0;
foreach ($search_exploded as $search_each) {
    $x++;
    $construct = "";
    if ($x == 1) {
        $construct .="$searchMethod LIKE '%$search_each%'";
    } else {
        $construct .="AND $searchMethod LIKE '%$search_each%'";
    }
}
$construct = " SELECT * FROM reviews WHERE $construct ";


$result = mysqli_query($conn, $construct);

if (!$result->num_rows) {
    echo 'Oops! No result found For ' . $title . ' (' . $word . ')' . $newlength;
}
if ($result->num_rows) {
    $number = $result->num_rows;
    echo ' ' . $number . ' Results Found Relating to ' . $title . ' (' . $word . '), Click 
    Here To See Results';
}
?>        

问题是脚本无法将选项识别为帖子