我有一个显示帖子的代码，如果has\\u post\\u thumpinal，问题是它会显示所有帖子，无论有没有thumpinal

    <?php
 global $post;
$args = array( \'numberposts\' => 5 );
 $postQuery = get_posts($args);
 $num  = 0;
 foreach( $postQuery as $post ) : setup_postdata($post);

        if ( has_post_thumbnail() ) { ?>
        <div style="display: inline-block;; ">

                <a href="<?php echo get_permalink(); ?>" title="Go to <?php echo the_title(); ?>" rel="bookmark">
                    <?php the_post_thumbnail(\'medium\'); ?>


                </a>
                </div>
                <div style="display: inline-block; width:50%; vertical-align: top;">
                <span style="vertical-align: top;" class="flex-caption"><?php the_title(\'<h1>\',\'</h1>\'); ?>

                    <?php the_content();  ?>
                    </span>
           </div>
        <?php 
        }
    endforeach; ?>