Can'；无法通过PHP获取要填充的高级搜索下拉列表值
我有一个高级表单，如下所示： 我正在使用一个来自Bootsnipp的模板，其中包含我的代码，我正在尝试调整它-可用 我的搜索方法是基于搜索将值附加到特定的URL参数，然后在PHP代码中进一步检查这些参数是否为空或包含值，然后执行从数据库获取拍卖的代码 自从我开始玩这个，“按状态过滤”按钮没有从数据库中填充状态过滤器（唯一出现的是空白选项），而且我的搜索按钮（带有眼镜图标）消失了。不知道为什么，因为这以前是有效的。注意我使用的是PDO。以下是过滤器部分的HTML和PHP代码：Can'；无法通过PHP获取要填充的高级搜索下拉列表值,php,pdo,get,form-submit,advanced-search,Php,Pdo,Get,Form Submit,Advanced Search,我有一个高级表单，如下所示： 我正在使用一个来自Bootsnipp的模板，其中包含我的代码，我正在尝试调整它-可用 我的搜索方法是基于搜索将值附加到特定的URL参数，然后在PHP代码中进一步检查这些参数是否为空或包含值，然后执行从数据库获取拍卖的代码 自从我开始玩这个，“按状态过滤”按钮没有从数据库中填充状态过滤器（唯一出现的是空白选项），而且我的搜索按钮（带有眼镜图标）消失了。不知道为什么，因为这以前是有效的。注意我使用的是PDO。以下是过滤器部分的HTML和PHP代码： <!-- P
<!-- Page Content -->
<div class="container">
<!--This is the search bar-->
<div class="container">
<div class="row">
<div class="col-sm-12">
<!-- http://stackoverflow.com/questions/8476602/appending-get-parameters-to-url-from-form-action-->
<!--If this is a form it messes up the styling-->
<div method="get" class="input-group" id="adv-search" action="listings.php">
<input type="text" name="q" class="form-control"
placeholder="Search for auctions by name or description" value=""/>
<div class="input-group-btn">
<div class="btn-group" role="group">
<div class="dropdown dropdown-lg">
<button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown"
aria-expanded="false"><span class="caret"></span></button>
<div class="dropdown-menu dropdown-menu-right" role="menu">
<form class="form-horizontal" role="form">
<div class="form-group">
<label for="filter">Sort By</label>
<select class="form-control" name="sort" value="by_lowest_time">
<!-- By default by lowest time remaining-->
<option value="by_lowest_time" selected>Lowest Time Remaining</option>
<option value="by_highest_time">Highest Time Remaining</option>
<option value="by_lowest_price">Lowest Price</option>
<option value="by_highest_price">Highest Price</option>
</select>
</div>
<div class="form-group">
<label for="filter">Filter by Category</label>
<?php
try {
$catsql = 'SELECT * FROM ebay_clone.Category';
$catq = $db->query($catsql);
$catq->setFetchMode(PDO::FETCH_ASSOC);
} catch (PDOException $e) {
echo 'ERROR: ' . $e->getMessage();
}
?>
<select class="form-control" name="cat">
<option value=""></option>
<!-- http://stackoverflow.com/questions/3078192/how-to-set-html-value-attribute-with-spaces-using-php-->
<?php while ($r = $catq->fetch()): ?>
<option
value="<?php echo str_replace(' ', '_', strtolower(htmlspecialchars($r['item_category']))); ?>"> <?php echo htmlspecialchars($r['item_category']) ?></option>
<?php endwhile; ?>
</select>
</div>
<div class="form-group">
<label for="filter">Filter by State</label>
<?php
try {
// error_reporting(E_ERROR | E_PARSE);
$statsql = 'SELECT * FROM ebay_clone.State';
$statq = $db->query($statsql);
$statq->setFetchMode(PDO::FETCH_ASSOC);
} catch (PDOException $e) {
echo 'ERROR: ' . $e->getMessage();
}
?>
<select class="form-control" name="state">
<!-- Blank option-->
<option value=""></option>
<?php while ($r = $statq->fetch()): ?>
<option value="<?php echo trimstr_replace(' ', '_', strtolower(htmlspecialchars($r['state']))); ?>"> <?php echo htmlspecialchars($r['state']) ?> </option>
<?php endwhile; ?>
</select>
</div>
<button type="button" value="search" class="btn btn-primary"><span
class="glyphicon glyphicon-search" aria-hidden="true"></span></button>
</form>
</div>
</div>
<button type="button" class="btn btn-primary"><span class="glyphicon glyphicon-search"
aria-hidden="true"></span></button>
</div>
</div>
</div>
</div>
</div>
</div>
排序
剩余最短时间
剩余最长时间
最低价格
最高价格
按类别筛选
while循环将填充一个$row
变量
<?php while ($row = $statq->fetch()): ?>
我已经弄明白了。这与我更改SQL语句并将新SQL语句重新分配给新查询有关。另外，我不需要引用我的数据库名称，只需要引用数据库中的表
现在可以这样做了：
<!--This is the search bar-->
<div class="container">
<div class="row">
<div class="col-sm-12">
<!-- http://stackoverflow.com/questions/8476602/appending-get-parameters-to-url-from-form-action-->
<!--If this is a form it messes up the styling-->
<div class="input-group" id="adv-search">
<form method='get' action='listings.php'>
<input type="text" name="q" class="form-control"
placeholder="Search for auctions by name or description" value=""/>
</form>
<div class="input-group-btn">
<div class="btn-group" role="group">
<div class="dropdown dropdown-lg">
<button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown"
aria-expanded="false"><span class="caret"></span></button>
<div class="dropdown-menu dropdown-menu-right" role="menu">
<form class="form-horizontal" role="form">
<div class="form-group">
<label for="filter">Sort By</label>
<select class="form-control" name="sort" value="by_lowest_time">
<!-- By default by lowest time remaining-->
<option value="by_lowest_time" selected>Lowest Time Remaining
</option>
<option value="by_highest_time">Highest Time Remaining</option>
<option value="by_lowest_price">Lowest Price</option>
<option value="by_highest_price">Highest Price</option>
</select>
</div>
<!-- Item Category -->
<div class="form-group">
<label for="filter">Filter by Category</label>
<select class="form-control" id="item-category" name="cat"
class="form-control">
<option value="" selected disabled hidden>Please Select a Category
</option>
<?php $sql = 'SELECT * FROM Category';
foreach ($db->query($sql) as $row) { ?>
<option
value="<?php echo $row['item_category']; ?>"><?php echo htmlspecialchars($row['item_category']); ?></option>
<?php } ?>
</select>
</div>
<!-- Item State -->
<div class="form-group">
<label for="filter">Filter by State</label>
<select class="form-control" id="item-state" name="state"
class="form-control">
<option value="" selected disabled hidden>Please Select a
Condition
</option>
<?php $sql = 'SELECT * FROM State';
foreach ($db->query($sql) as $row) { ?>
<option
value="<?php echo $row['state']; ?>"><?php echo htmlspecialchars($row['state']); ?></option>
<?php } ?>
</select>
</div>
<button type="submit" action="listings.php" method="get" value="search"
class="btn btn-primary"><span
class="glyphicon glyphicon-search" aria-hidden="true"></span>
</button>
</form>
</div>
</div>
<button type="submit" class="btn btn-primary"><span class="glyphicon glyphicon-search"
aria-hidden="true"></span></button>
</div>
</div>
</div>
</div>
</div>
</div>
排序
剩余最短时间
剩余最长时间
最低价格
最高价格
按类别筛选
请选择一个类别
抱歉是的，我注意到了，但不幸的是，这仍然不能解决问题。问题修正。代码生成了什么html代码？
<!--This is the search bar-->
<div class="container">
<div class="row">
<div class="col-sm-12">
<!-- http://stackoverflow.com/questions/8476602/appending-get-parameters-to-url-from-form-action-->
<!--If this is a form it messes up the styling-->
<div class="input-group" id="adv-search">
<form method='get' action='listings.php'>
<input type="text" name="q" class="form-control"
placeholder="Search for auctions by name or description" value=""/>
</form>
<div class="input-group-btn">
<div class="btn-group" role="group">
<div class="dropdown dropdown-lg">
<button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown"
aria-expanded="false"><span class="caret"></span></button>
<div class="dropdown-menu dropdown-menu-right" role="menu">
<form class="form-horizontal" role="form">
<div class="form-group">
<label for="filter">Sort By</label>
<select class="form-control" name="sort" value="by_lowest_time">
<!-- By default by lowest time remaining-->
<option value="by_lowest_time" selected>Lowest Time Remaining
</option>
<option value="by_highest_time">Highest Time Remaining</option>
<option value="by_lowest_price">Lowest Price</option>
<option value="by_highest_price">Highest Price</option>
</select>
</div>
<!-- Item Category -->
<div class="form-group">
<label for="filter">Filter by Category</label>
<select class="form-control" id="item-category" name="cat"
class="form-control">
<option value="" selected disabled hidden>Please Select a Category
</option>
<?php $sql = 'SELECT * FROM Category';
foreach ($db->query($sql) as $row) { ?>
<option
value="<?php echo $row['item_category']; ?>"><?php echo htmlspecialchars($row['item_category']); ?></option>
<?php } ?>
</select>
</div>
<!-- Item State -->
<div class="form-group">
<label for="filter">Filter by State</label>
<select class="form-control" id="item-state" name="state"
class="form-control">
<option value="" selected disabled hidden>Please Select a
Condition
</option>
<?php $sql = 'SELECT * FROM State';
foreach ($db->query($sql) as $row) { ?>
<option
value="<?php echo $row['state']; ?>"><?php echo htmlspecialchars($row['state']); ?></option>
<?php } ?>
</select>
</div>
<button type="submit" action="listings.php" method="get" value="search"
class="btn btn-primary"><span
class="glyphicon glyphicon-search" aria-hidden="true"></span>
</button>
</form>
</div>
</div>
<button type="submit" class="btn btn-primary"><span class="glyphicon glyphicon-search"
aria-hidden="true"></span></button>
</div>
</div>
</div>
</div>
</div>
</div>