有人可以检查代码并告诉我如何修复它吗？例如：如果第二个选择框操作为== 'showAll'，那么所有框操作都会变为== 'showAll'（它不会变为：从国家/地区到国家/地区类型，但我看到所有内容不仅仅是选择框）。请帮我解决。
主页：
<script src="public/js/transport-search.js"></script>
<div class="container" style="padding-top: 50px;">
<h1>
Transport (Total:<?php
$getTransport = $tr->getAll();
$total = 0;
if($getTransport) {
while($result = $getTransport->fetch_assoc()) {
$total++;
}
echo $total;
}
?>)
</h1>
<?php
$login = Session::get('clubLogin');
if ($login == true) {
?>
<button type="button" class="btn btn-primary btn-md" onclick="location.href='transport-add.php';"><span
class="glyphicon glyphicon-plus"></span> Add new
</button>
<?php
}
?>
<hr/>
<div class="row">
<div class="col-sm-4">
<select id="getFrcountries" class="form-control" required>
<option value="showAll" selected>From country</option>
<?php
$getLocFr = $tr->getCountries();
if ($getLocFr) {
while ($result = $getLocFr->fetch_assoc()) {
?>
<option value="<?php echo $result['frcountry'] ?>"><?php echo $result['frcountry'] ?></option>
<?php
}
}
?>
</select>
</div>
<div class="col-sm-4">
<select id="getTocountries" class="form-control" required>
<option value="showAll" selected>To country</option>
<?php
$getLocTo = $tr->getCountries();
if ($getLocTo) {
while ($result = $getLocTo->fetch_assoc()) {
?>
<option value="<?php echo $result['tocountry'] ?>"><?php echo $result['tocountry'] ?></option>
<?php
}
}
?>
</select>
</div>
<div class="col-sm-4">
<select id="getTypes" class="form-control" required>
<option value="showAll" selected>Type</option>
<?php
$getType = $tr->getTypes();
if ($getType) {
while ($result = $getType->fetch_assoc()) {
?>
<option value="<?php echo $result['type'] ?>"><?php echo $result['type'] ?></option>
<?php
}
}
?>
</select>
</div>
</div>
<hr/>
<div class="row">
<div class="col-sm-12">
<div class="col-sm-2 text-center">
<p>From country</p>
</div>
<div class="col-sm-2 text-center">
<p>To country</p>
</div>
<div class="col-sm-2 text-center">
<p>Type</p>
</div>
<div class="col-sm-2 text-center">
<p>Price</p>
</div>
<div class="col-sm-2 text-center">
<p>Date</p>
</div>
<div class="col-sm-2 text-center">
<p>Profile</p>
</div>
</div>
</div>
<div class="" id="display">
<!-- Records will be displayed here -->
</div>
</div>