我似乎在尝试显示特色图像的“可选文本”时遇到了问题。

这是我一直在研究的代码。不确定为什么备选文本显示为空白。

        <?php 

        $projects = new WP_Query( array( \'post_type\' => \'print-billboard\' ) );
        if ( $projects->have_posts() ) : while ( $projects->have_posts() ) :
        $projects->the_post();



        ?>

            <?php 
            $featured_image = wp_get_attachment_image_src( get_post_thumbnail_id(), \'large\' );
            $featured_image_url = wp_get_attachment_url( get_post_thumbnail_id() );
            $alt = get_post_meta( $featured_image, \'_wp_attachment_image_alt\', true );
            if ( has_post_thumbnail() ) :

            ?>


            <a href="<?php echo $featured_image_url; ?>" id="post-<?php the_ID(); ?>" <?php post_class( \'four columns project-post fancybox\' ) ?> >

                <?php $thumbnail_meta = get_post_meta( $featured_image, \'_wp_attachment_image_alt\', true ); ?>

                <figure class="full-width featured-image">
                    <img src="<?php echo $featured_image[0]; ?>" data-fancybox-group="gallery" title="Lorem ipsum dolor sit amet" alt="<?php echo $featured_image; ?>" />
                    <div class="overlay">
                    </div>
                </figure>



            </a>

            <?php endif; ?>

        <?php wp_reset_postdata(); ?>

        <?php endwhile; else: ?>

        <p class="error-message">No Projects</p>

        <?php endif; ?>

        <?php wp_reset_query(); ?>