如何在Wordpress中将帖子的特色图片设置为背景图片

Question

我创建了一个部分来显示所有帖子内容。我现在的工作是将帖子缩略图设置为背景图像。

这里是本节的结构：

<section id="testimonials"> 
    <div class="testimonials-container">
        <div class="heading-container">
            <h3 class="page-title">Testimonials</h3>
        </div>
        <div class="testimonials-box">
            <?php 
                $queryposts = array(            
                    'post__in' => array(75,73), 
                    'post_type' => 'post',
                    'posts_per_page' => -1,  
                    'order' => 'ASC' 
                );
                $lastblog = new WP_Query( $queryposts );            
                if($lastblog->have_posts() ):
                    while($lastblog->have_posts()): $lastblog->the_post(); ?>

                    <div class="testimonial-wrapper">
                        <div class="testimonial-item">   
                            <p class="test-content"><?php the_content(); ?></p>
                            <p class="test-title"><?php the_title(); ?></p>
                            <?php $thumb = wp_get_attachment_image_src( get_post_thumbnail_id($post->ID), 'full' );?>
                            <div class"image-class" style="background-image: url('<?php echo $thumb['0'];?>')"></div>
                            </div>
                    </div>
                    <?php endwhile;
                endif;            
                wp_reset_postdata();
            ?> 
        </div>  
    </div>
</section>

这是我的CSS：

section#testimonials {
    height: 400px;
    background-image: url(images/testimonials-bg.jpg);
    background-size: cover;
    background-repeat: no-repeat;
    text-align: center;

}

.testimonial-wrapper {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
}

.image-class{
    display: block;
    width: 125px;
    height: 125px;
    background-size: cover;
    background-repeat: no-repeat;
}

当我尝试查看该页面时，该图像没有显示并试图检查该页面，结果显示如下：

background-image: url((unknown));

如何将缩略图设置为div框的背景图像？

希望你能帮忙

Answer 1

请尝试以下代码，

<?php $thumb = get_the_post_thumbnail_url(); ?>
<div class"image-class" style="background-image: url('<?php echo $thumb;?>')"></div>