wordpress栏目内容在首页调用的三种方法

<?php $posts = get_posts( "category=4&numberposts=6" ); ?>
		<?php if( $posts ) : ?>
		<?php foreach( $posts as $post ) : setup_postdata( $post ); ?>
<div class="col-md-3">
<a href="<?php the_permalink() ?>"><img src="<?php if ( has_post_thumbnail() ) { ?>
<?php echo get_the_post_thumbnail_url($post->ID); ?>
<?php } else {?>
<?php bloginfo('template_url'); ?>/images/noneimg-product.jpg
<?php } ?>" alt="<?php the_title(); ?>" class="shadow-sm img-fluid"></a>
</div>
<!-- col-lg-3 -->
	<?php endforeach; ?>
		<?php endif; ?>
<?php wp_reset_query();?>

<?php  
$args = array(  
'posts_per_page' => 6,  
'cat' => 4,
'post__in' => get_option( 'sticky_posts' )  
);//wodepress.com  
$sticky_posts = new WP_Query( $args );  
while ( $sticky_posts->have_posts() ) : $sticky_posts->the_post();?> 
<div class="col-md-3">
<a href="<?php the_permalink() ?>"><img src="<?php if ( has_post_thumbnail() ) { ?>
<?php echo get_the_post_thumbnail_url($post->ID); ?>
<?php } else {?>
<?php bloginfo('template_url'); ?>/images/noneimg-product.jpg
<?php } ?>" alt="<?php the_title(); ?>" class="shadow-sm img-fluid"></a>
</div>
<!-- col-lg-3 -->
<?php endwhile; wp_reset_query();?>

<?php
$cat = get_the_category();
foreach($cat as $key=>$category){
$catid = $category->term_id;
}
$args = array('orderby' => 'rand','showposts' => 6,'cat' => 4 );
$query_posts = new WP_Query();
$query_posts->query($args);
while ($query_posts->have_posts()) : $query_posts->the_post();
?>
<div class="col-md-3">
<a href="<?php the_permalink() ?>"><img src="<?php if ( has_post_thumbnail() ) { ?>
<?php echo get_the_post_thumbnail_url($post->ID); ?>
<?php } else {?>
<?php bloginfo('template_url'); ?>/images/noneimg-product.jpg
<?php } ?>" alt="<?php the_title(); ?>" class="shadow-sm img-fluid"></a>
</div>
<!-- col-lg-3 -->
<?php endwhile;?>
<?php wp_reset_query(); ?>