经过一个月的尝试，终于可以正常工作了，但是有一个小问题我无法解决！如果他发现了两个分类法之间的帖子，则过滤器是可以的，但是如果没有任何帖子，它应该给我get_template_part( 'template-parts/content', 'none' );，但他停止了过滤...！
这是模板页面。
<?php
/**
* Template Name: Cat Filter Full Width
*
* Use this template to build pages with Page Builders.
*
* @package HitMag
*/
get_header(); ?>
<div class="filter-content-area" style="position: relative;">
<div id="primary-filter">
<form action="<?php echo site_url() ?>/wp-admin/admin-ajax.php" method="POST" id="misha_filters">
<?php echo "<label><input type='checkbox' name='all'> All</label>"; ?>
<?php
if( $terms = get_terms( 'zones', 'orderby=name%parent=0' ) ) : // to make it simple I use default categories
echo '<select name="categoryfilter"><option>All Creative Zones...</option>';
foreach ( $terms as $term ) :
echo '<option value="' . $term->term_id . '">' . $term->name . '</option>'; // ID of the category as the value of an option
endforeach;
echo '</select>';
endif;
?>
<?php
if( $terms = get_terms( 'category', 'orderby=name%parent=0&exclude=233,234,235,236,237,238,239,240,241,242,243,244,245,246,247,248,249,250,18,212,214,47,35,125,6,17,209,252' ) ) : // to make it simple I use default categories
echo '<select name="categoryfilter2"><option>Select Zone...</option>';
foreach ( $terms as $term ) :
echo '<option value="' . $term->term_id . '">' . $term->name . '</option>'; // ID of the category as the value of an option
endforeach;
echo '</select>';
endif;
?>
<button>Apply filter</button>
<input type="hidden" name="action" value="myfilter">
</form>
</div>
</div>
<?php
$args = array(
'orderby' => 'date',
'post_type' => 'post',
'post_status' => 'publish',
'ignore_sticky_posts' => 1,
'posts_per_page' => 18,
'tax_query' => array(
array(
'taxonomy' => 'category',
'field' => 'slug',
'terms' => array('galleries')
),
)
);
$query = new WP_Query( $args );
if ( $query->have_posts() ) : ?>
<div id="responses">
<?php
$archive_content_layout = get_option( 'archive_content_layout', 'th-grid-2' );
echo '<div class="posts-wrap ' . esc_attr( $archive_content_layout ) . '">';
/* Start the Loop */
while ( $query->have_posts() ) : $query->the_post();
get_template_part( 'template-parts/content', get_post_format() );
endwhile;
echo '</div><!-- .posts-wrap -->';
wp_reset_postdata();
?>
</div>
<?php
global $wp_query;
if ( $query->max_num_pages > 1 ) :
echo '<div id="misha_loadmore">More posts</div>'; // you can use <a> as well
endif;
the_posts_pagination();
else :
get_template_part( 'template-parts/content', 'none' );
endif; ?>
</main><!-- #main -->
</div><!-- #primary -->
<?php
get_sidebar();
get_footer();
我的loadmore脚本的js
function misha_my_load_more_button_scripts() {
global $wp_query;
wp_register_script( 'misha_filter_scripts', get_stylesheet_directory_uri().'/custom-js/myloadmorebutton.js', array('jquery'), '1.0.0', true );
wp_enqueue_script( 'misha_filter_scripts' );
// now the most interesting part
// we have to pass parameters to myloadmore.js script but we can get the parameters values only in PHP
// you can define variables directly in your HTML but I decided that the most proper way is wp_localize_script()
wp_localize_script( 'misha_filter_scripts', 'misha_loadmore_button_params', array(
'ajaxurl' => site_url() . '/wp-admin/admin-ajax.php', // WordPress AJAX
'posts' => json_encode( $query->query_vars ), // everything about your loop is here
'current_page' => $query->query_vars['paged'] ? $query->query_vars['paged'] : 1,
'max_page' => $query->max_num_pages
) );
}
add_action( 'wp_enqueue_scripts', 'misha_my_load_more_button_scripts', 1 );
这是过滤器功能。
function misha_filter_function(){
$args = array(
'post_type' => 'post',
'post_status' => 'publish',
'ignore_sticky_posts' => 1,
'posts_per_page' => '18'
);
$args['tax_query'] = array(
'relation' => 'AND',
);
if( empty( $_POST['all'] ) ) {
if( isset( $_POST['categoryfilter'] ) )
$args['tax_query'] = array(
array(
'taxonomy' => 'zones',
'field' => 'id',
'terms' => $_POST['categoryfilter'],
)
);
if( isset( $_POST['categoryfilter'] ) )
$args['tax_query'][] = array(
array(
'taxonomy' => 'zones',
'field' => 'id',
'terms' => $_POST['categoryfilter'],
)
);
if( isset( $_POST['categoryfilter2'] ) )
$args['tax_query'][] = array(
array(
'taxonomy' => 'category',
'field' => 'id',
'terms' => $_POST['categoryfilter2'],
)
);
}
$query = new WP_Query( $args );
global $wp_query;
if( $query->have_posts() ) :
ob_start();
$archive_content_layout = get_option( 'archive_content_layout', 'th-grid-2' );
echo '<div class="posts-wrap ' . esc_attr( $archive_content_layout ) . '">';
while( $query->have_posts() ): $query->the_post();
get_template_part( 'template-parts/content', get_post_format() );
endwhile;
echo '</div><!-- .posts-wrap -->';
wp_reset_postdata();
$content = ob_get_contents(); // we pass the posts to variable
ob_end_clean(); // clear the buffer
else :
get_template_part( 'template-parts/content', 'none' );
endif;
echo json_encode( array(
'posts' => serialize( $query->query_vars ),
'max_page' => $query->max_num_pages,
'found_posts' => $query->found_posts,
'content' => $content
) );
die();
}
add_action('wp_ajax_myfilter', 'misha_filter_function');
add_action('wp_ajax_nopriv_myfilter', 'misha_filter_function');
此功能适用于Ajax loadmore帖子。
add_action('wp_ajax_loadmorebutton', 'misha_loadmore_button_ajax_handler');
add_action('wp_ajax_nopriv_loadmorebutton', 'misha_loadmore_button_ajax_handler');
function misha_loadmore_button_ajax_handler(){
$args = unserialize( stripslashes( $_POST['query']) );
$args['paged'] = $_POST['page'] + 1;
$args['post_status'] = 'publish';
$query = new WP_Query( $args );
global $wp_query;
if( $query->have_posts() ) :
$archive_content_layout = get_option( 'archive_content_layout', 'th-grid-2' );
echo '<div class="posts-wrap ' . esc_attr( $archive_content_layout ) . '">';
while( $query->have_posts() ): $query->the_post();
get_template_part( 'template-parts/content', get_post_format() );
endwhile;
echo '</div><!-- .posts-wrap -->';
else :
get_template_part( 'template-parts/content', 'none' );
endif;
die;
}
最后还有JS用于过滤器功能action和loadmore。
jQuery(document).ready( function($) {
/*
* Load More
*/
$('#misha_loadmore').click(function(){
$.ajax({
url : misha_loadmore_button_params.ajaxurl, // AJAX handler
data : {
'action': 'loadmorebutton', // the parameter for admin-ajax.php
'query': misha_loadmore_button_params.posts, // loop parameters passed by wp_localize_script()
'page' : misha_loadmore_button_params.current_page // current page
},
type : 'POST',
beforeSend : function ( xhr ) {
$('#misha_loadmore').text('Loading...'); // some type of preloader
},
success : function( data ){
if( data ) {
$('#misha_loadmore').text( 'More posts' );
$('#responses').append(data); // insert new posts
misha_loadmore_button_params.current_page++;
if ( misha_loadmore_button_params.current_page == misha_loadmore_button_params.max_page )
$('#misha_loadmore').hide(); // if last page, HIDE the button
} else {
$('#misha_loadmore').hide(); // if no data, HIDE the button as well
}
}
});
return false;
});
/*
* Filter
*/
$('#misha_filters').submit(function(){
$.ajax({
url : misha_loadmore_button_params.ajaxurl,
data : $('#misha_filters').serialize(), // form data
dataType : 'json', // this data type allows us to receive objects from the server
type : 'POST',
beforeSend : function(xhr){
$('#misha_filters').find('button').text('Filtering...');
},
success:function(data){
$('html,body').animate({ scrollTop: $("#main").offset().top }, "slow");
// when filter applied:
// set the current page to 1
misha_loadmore_button_params.current_page = 1;
// set the new query parameters
misha_loadmore_button_params.posts = data.posts;
// set the new max page parameter
misha_loadmore_button_params.max_page = data.max_page;
// change the button label back
$('#misha_filters').find('button').text('Apply filter');
// insert the posts to the container
$('#responses').html(data.content);
// hide load more button, if there are not enough posts for the second page
if ( data.max_page < 2 ) {
$('#misha_loadmore').hide();
} else {
$('#misha_loadmore').show();
}
}
});
// do not submit the form
return false;
});
});
答案 0 :(得分：1)
由于要将模板的输出分配给变量$content，因此需要在过滤器函数的else分支中使用输出缓冲。就像您在if分支中所做的一样。其余部分看起来像这样：
else :
ob_start(); // start the buffer to capture the output of the template
get_template_part( 'template-parts/content', 'none' );
$content = ob_get_contents(); // pass the output to variable
ob_end_clean(); // clear the buffer
与您当前问题无关的警告。您不应使用unserialize的方式。这是非常不安全的。 manual中有一个红色警告，通过搜索PHP对象注入，您可以轻松找到其危险性的解释。
帮个忙，并使用json_encode/decode。因为query_vars是一个简单的数组，所以不会有什么区别。