我创建了一些面包屑，告诉用户已经应用了哪些过滤器以及显示了多少帖子。我的问题是我试图在声明变量之前抓取变量，这是因为面包屑位于post循环之上。这是相关代码，向您展示我的意思;
这是我的$ post_counter变量的后循环
<section id="properties">
<div class="container">
<div class="row">
<div class="col">
<div class="row">
<?php
if($_GET['min_price'] && !empty($_GET['min_price'])){
$min_price = $_GET['min_price'];
}else{
$min_price = 0;
}
if($_GET['max_price'] && !empty($_GET['max_price'])){
$max_price = $_GET['max_price'];
}else{
$max_price = 10000000;
}
if($_GET['min_beds'] && !empty($_GET['min_beds'])){
$min_beds = $_GET['min_beds'];
}else{
$min_beds = '1';
}
if($_GET['max_beds'] && !empty($_GET['max_beds'])){
$max_beds = $_GET['max_beds'];
}else{
$max_beds = '6+';
}
if($_GET['location'] && !empty($_GET['location'])){
$location = $_GET['location'];
$location_val = stripslashes($location);
}
if($_GET['type'] && !empty($_GET['type'])){
$type = $_GET['type'];
}else{
$type = array("Detached", "Semi-Detached", "Terraced", "End of Terrace", "Apartment", "Bungalow", "Commercial");
}
if($_GET['flash_type'] && !empty($_GET['flash_type'])){
$flash_type = $_GET['flash_type'];
}else{
$flash_type = array("Ideal First Time Buy", "Ideal Investment", "Under Offer", "Nothing Selected");
}
$posts = get_posts(array(
'posts_per_page' => -1,
'post_type' => 'property',
'orderby' => 'date',
'meta_query' => array(
'relation' => 'AND',
array(
'key' => 'property_status',
'value' => 'For Sale'
),
array(
'key' => 'property_price',
'type' => 'NUMERIC',
'value' => array($min_price, $max_price),
'compare' => 'BETWEEN'
),
array(
'key' => 'bedrooms',
'value' => array($min_beds, $max_beds),
'compare' => 'BETWEEN'
),
array(
'relation' => 'OR',
array(
'key' => 'street',
'value' => $location_val,
'compare' => 'LIKE'
),
array(
'key' => 'town',
'value' => $location_val,
'compare' => 'LIKE'
),
array(
'key' => 'county',
'value' => $location_val,
'compare' => 'LIKE'
),
array(
'key' => 'postcode',
'value' => $location_val,
'compare' => 'LIKE'
)
),
array(
'key' => 'type_of_property',
'value' => $type,
'compare' => 'IN'
),
array(
'key' => 'optional_category',
'value' => $flash_type,
'compare' => 'IN'
),
)
));
$post_counter = 0;
if( $posts ):?>
<?php foreach( $posts as $post ):
setup_postdata( $post );
$post_counter = $post_counter + 1;
?>
<div class="col-sm-6 col-md-4 col-lg-3">
<div class="shadowwrapper2">
<a href="<?php the_permalink(); ?>">
<?php
$main_field = get_field('images');
$first_row = $main_field[0];
$img = $first_row['image'];
$img_med = $img['sizes']['medium'];
?>
<div class="propertywrapper">
<img class="img-fluid gal_imgs" src="<?php echo $img_med ?>" alt="<?php $img['alt']; ?>"/>
<?php $secondary_flash = get_field('optional_category'); ?>
<?php if($secondary_flash == "Ideal First Time Buy"): ?>
<span class="second_flash">Ideal First Time Buy</span>
<?php elseif($secondary_flash == "Ideal Investment"): ?>
<span class="second_flash">Ideal Investment</span>
<?php elseif($secondary_flash == "Under offer"): ?>
<span class="second_flash">Under offer</span>
<?php endif; ?>
</div>
<div class="cornerflash">
<img src="<?php bloginfo('template_directory'); ?>/imgs/forsale.svg" alt="corner flash">
</div>
<div class="propertyinfo">
<div class="row m-0">
<div class="col-6 p-0 mt-2"><?php the_field('type_of_property'); ?></div>
<div class="col-6 p-0 mt-2"><?php the_field('bedrooms'); ?> bedrooms</div>
</div>
</div>
<div class="streetpricewrapper">
<p class="streetname">
<?php the_field('street'); ?>, <?php the_field('town'); ?>
</p>
<p class="price">
£<?php the_field('property_price'); ?>
</p>
</div>
</a>
</div>
</div>
<?php endforeach; ?>
<?php wp_reset_postdata(); ?>
<?php endif; ?>
</div>
</div>
</div>
</div>
</section>
这是我的面包屑这个部分位于我页面上的post循环之上。这是我试图检索$ post_counter变量的地方;
<div class="container">
<div class="row">
<div class="col">
<div id="crumb">
<p>Now showing <?php echo $post_counter; ?> properties</p>
<?php
// check if property type has been selected if so loop through them and display them
if( $_GET['type'] ){
$crumb_type = $_GET['type'];
foreach($crumb_type as $val) {
echo '<span>'.$val.', </span>';
}
}
// check if min beds / max beds has been select if so display it in the crumb
if( $_GET['min_beds'] ){
$crumb_minbeds = $_GET['min_beds'];
echo '<p>from </p><span>'.$crumb_minbeds.' bedrooms, </span>';
}
if( $_GET['max_beds']){
$crumb_maxbeds = $_GET['max_beds'];
echo '<p>up to </p><span>'.$crumb_maxbeds.' bedrooms, </span>';
}
// check if min price / max price has been select if so display it in the crumb
if( $_GET['min_price'] ){
$crumb_minprice = $_GET['min_price'];
echo '<p>from </p><span>£'.$crumb_minprice.' </span>';
}
if( $_GET['max_price']){
$crumb_maxprice = $_GET['max_price'];
echo '<p>up to </p><span>£'.$crumb_maxprice.' </span>';
}
// check if location is set
if( $_GET['location'] ){
$crumb_location = $_GET['location'];
echo '<p>properties in </p><span>'.stripslashes($crumb_location).'</span>';
}
// check if secondary filters are applied, if so display a clickable box
if( $_GET['flash_type'] ): ?>
<div id="flash_crumbs">
<?php
if( in_array('Ideal First Time Buy', $_GET['flash_type']) ): ?>
<a href="javascript:;">Ideal First Time Buy <span data-id="first_time" >×</span></a>
<?php endif;
if( in_array('Ideal Investment', $_GET['flash_type']) ): ?>
<a href="javascript:;">Ideal Investment <span data-id="investment" >×</span></a>
<?php endif;
if( in_array('Under Offer', $_GET['flash_type']) ): ?>
<a href="javascript:;">Under Offer <span data-id="under_offer" >×</span></a>
<?php endif; ?>
</div>
<?php endif;
?>
</div>
</div>
</div>
</div>
答案 0 :(得分：2)
在显示之前处理所有内容。通过这种方式，您可以将代码中的问题分开来看起来更好。
将您的$posts = get_posts(...)移到php标记中的header.php内，然后在breadcrumb中写一下：
<p>Now showing <?php echo count($posts); ?> properties</p>
通常，在显示数据之前处理数据会更好。