我使用AJAX创建了一个带有自定义痕迹的后置过滤器。所以现在从functions.php文件中返回了相当多的HTML。有人告诉我，我不应该这样做，但他们没有告诉我原因。
add_action('wp_ajax_soldfilter', 'sold_filter');
add_action('wp_ajax_nopriv_soldfilter', 'sold_filter');
function sold_filter(){
$posts = array(
'posts_per_page' => -1,
'post_type' => 'property',
'orderby' => 'date',
'meta_key' => 'property_status',
'meta_value' => 'Sold'
);
$posts['meta_query'] = array( 'relation' => 'AND' );
// price filtering
if($_POST['min_price'] && !empty($_POST['min_price'])){
$min_price = $_POST['min_price'];
}else{
$min_price = 0;
}
if($_POST['max_price'] && !empty($_POST['max_price'])){
$max_price = $_POST['max_price'];
}else{
$max_price = 10000000;
}
$posts['meta_query'][] = array(
'key' => 'property_price',
'type' => 'NUMERIC',
'value' => array($min_price, $max_price),
'compare' => 'BETWEEN'
);
// bed filtering
if($_POST['min_beds'] && !empty($_POST['min_beds'])){
$min_beds = $_POST['min_beds'];
}else{
$min_beds = '1';
}
if($_POST['max_beds'] && !empty($_POST['max_beds'])){
$max_beds = $_POST['max_beds'];
}else{
$max_beds = '9+';
}
$posts['meta_query'][] = array(
'key' => 'bedrooms',
'value' => array($min_beds, $max_beds),
'compare' => 'BETWEEN'
);
//location filtering
if(isset( $_POST['location'] ) && $_POST['location']){
$location = $_POST['location'];
$location_val = stripslashes($location);
$posts['meta_query'][] = 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'
)
);
}
// property type filtering
if(isset( $_POST['type'] ) && $_POST['type']){
$posts['meta_query'][] = array(
'key' => 'type_of_property',
'value' => $_POST['type'],
'compare' => 'IN'
);
}
// secondary flash filtering
if(isset( $_POST['flash_type'] ) && $_POST['flash_type']){
$posts['meta_query'][] = array(
'key' => 'optional_category',
'value' => $_POST['flash_type'],
'compare' => 'IN'
);
}
$query = new WP_Query( $posts );?>
<div class="row">
<div class="col-12">
<div id="crumb">
<p>Now showing <span id="loop_count"></span> properties</p>
<?php
// check if property type has been selected if so loop through them and display them
if( $_POST['type'] ){
$crumb_type = $_POST['type'];
foreach($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( $_POST['min_beds'] ){
$crumb_minbeds = $_POST['min_beds'];
echo '<p>from </p><span>'.$crumb_minbeds.' bedrooms </span>';
}
if( $_POST['max_beds']){
$crumb_maxbeds = $_POST['max_beds'];
echo '<p>up to </p><span>'.$crumb_maxbeds.' bedrooms, </span>';
}
// check if min price / max price has been select if so display it in the crumb
if( $_POST['min_price'] ){
$crumb_minprice = $_POST['min_price'];
echo '<p>from </p><span>£'.$crumb_minprice.' </span>';
}
if( $_POST['max_price']){
$crumb_maxprice = $_POST['max_price'];
echo '<p>up to </p><span>£'.$crumb_maxprice.' </span>';
}
// check if location is set
if( $_POST['location'] ){
$crumb_location = $_POST['location'];
echo '<p>properties in </p><span>'.stripslashes($crumb_location).'</span>';
}
// check if secondary filters are applied, if so display a clickable box
if( $_POST['flash_type'] ): ?>
<div id="flash_crumbs">
<?php
if( in_array('Ideal First Time Buy', $_POST['flash_type']) ): ?>
<a href="javascript:;">Ideal First Time Buy <span data-id="first_time" >×</span></a>
<?php endif;
if( in_array('Ideal Investment', $_POST['flash_type']) ): ?>
<a href="javascript:;">Ideal Investment <span data-id="investment" >×</span></a>
<?php endif;
if( in_array('Under Offer', $_POST['flash_type']) ): ?>
<a href="javascript:;">Under Offer <span data-id="under_offer" >×</span></a>
<?php endif; ?>
</div>
<?php endif;
?>
</div>
</div>
</div>
<?php if( $query->have_posts() ): ?>
<div class="row">
<?php while( $query->have_posts() ): $query->the_post() ?>
<div class="col-sm-6 col-md-4 col-lg-3 post">
<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 endwhile; ?>
</div>
<?php
wp_reset_postdata();
endif;
wp_die();
}
答案 0 :(得分：2)
您使用HTML传输更多数据，可能会增加延迟。
HTML有时会重复，这会大大增加您转移的金额。 AJAX请求通常用于大量项目列表，在这种情况下，仅从列表中传输唯一数据并在前端创建带有循环的HTML可能更有意义。
此外，有时您可能希望使用相同的数据创建不同类型的标记，在这种情况下，JSON更通用。
对于较小的内容，没有多少重复，只是以一种方式使用，转移HTML并不一定有很大的缺点。它不是最性感的解决方案，但并非所有东西都需要优雅地设计。