PHP 搜索/过滤功能

Question

我的页面上有一个过滤器/搜索功能，最多包含 4 个下拉菜单，下拉菜单显示取决于最后一个下拉菜单是什么...

在我的下拉列表中，我有 4 种可能的情况

车辆类型

<select name="vehicleType" id="vehicleType">
    <option value="choose" selected="selected">Please choose</option>
    <option value="hgv">HGV</option>
    <option value="psv">PSV</option>
    <option value="lgv">LGV</option>
    // MORE OPTIONS AVAILABLE
</select>

覆盖区域

<select name="coverageRegion" id="coverageRegion">
    <option value="choose" selected="selected">Please choose</option>
    <option value="national">National</option>  
    <option value="international">International</option>
</select>

首选网站类型

<select name="locationType" id="locationType">
    <option value="choose" selected="selected">Please choose</option>
    <option value="truckstops">Truck stops at lowest price</option>  
    <option value="motorway">Branded motorway sites</option>
</select>

对于我的搜索功能，我目前使用“IF”语句，我说如果“vehicleType = X and Coverage Region = X”显示这些结果。

不过，我现在需要为县添加第 4 个下拉列表。在我的县部分，将有大约 50 个县，我不能现实地为每一种可能的情况都有一个 IF 语句，因为它会花费太长时间，最好的方法是什么？

我目前使用我的 PHP 所做的一个例子是......

   if ($_POST['vehicleType'] == 'car' && $_POST['pricing'] == 'pump' ) {             


             $customkey = 'vehicleType';
             $customvalue = 'car'; 

             $customkey1 = 'pricing'; 
             $customvalue1 = 'pump'; 

             $args = array('orderby' => 'meta_value_num', 'meta_key' => 'order', 'order' => 'ASC',
            'meta_query' => array(
            array(
                'key' => $customkey,
                'value' => $customvalue,
                'compare' => '='
            ),
            array(
                'key' => $customkey1,
                'value' => $customvalue1,
                'compare' => '='
            )
            )
            );

            $query = new WP_Query( $args );// The Loop
                $i = 0; $i = -1;

while ( $query->have_posts() )
{
    $i++;
    $query->the_post();
    if ( $keys = get_post_custom_keys() )
    {
        echo "<div class='clearfix card-prod ".($i==0?'first':'')."'><div class='top-dets'><span class='card-title'>";
        echo the_title();
        echo "</span>";



    // Network query 
        $network_value = get_post_custom_values('srchnetwork');
        foreach ( $network_value as $key => $value ) {
        echo '<span class="srch-val-">'. $value . '</span>'; }// Pricing Query
        $pricing_value = get_post_custom_values('srchpricing');
        foreach ( $pricing_value as $key => $value ) {
        echo '<span class="srch-val-1">'. $value . '</span>'; }

    // Setup Query
        $setup_value = get_post_custom_values('srchsetupfee');
        foreach ( $setup_value as $key => $value ) {
        echo '<span class="srch-val-2">'. $value . '</span>'; }

    // Services Query
        $services_value = get_post_custom_values('srchservices');
        foreach ( $services_value as $key => $value ) {
        echo '<span class="srch-val-3">'. $value . '</span></div>'; }

    // Big Card Query
        $bigcard_value = get_post_custom_values('bigcard');
        foreach ( $bigcard_value as $key => $value ) {
             echo '<a href="/" class="cardclick"><img src="/wp-content/themes/CAFC/images/cards/'. $value . '" alt="'; }
         echo the_title() . '" /></a>';



    echo '<img src="wp-content/themes/CAFC/images/top-choice.jpg" alt="Top Choice" class="topchoice">';
echo the_excerpt()."</div>";    

        }
}

Answer 1

相反，有一个简单的方法。搜索后您必须获得 key 。把它的值(value)。

<option = "<?php echo $value;?>">Blah blah</option>

现在只需在更改时发送此键并根据此外键获取结果。