wordpress教程如何获取文章缩略图ID

wordpress建站中如何自带函数获取文章缩略图ID，下面web建站小编给大家简单介绍一下get_post_thumbnail_id函数的基本用法！

函数原型：

get_post_thumbnail_id( int|WP_Post $post = null ): int|false

参数说明：

$post，文章 ID 或 文章对象。

开启文章缩略图功能：

add_theme_support( 'post-thumbnails' ); 

函数源码：

function get_post_thumbnail_id( $post = null ) {
  $post = get_post( $post );
  
  if ( ! $post ) {
    return false;
  }
  
  $thumbnail_id = (int) get_post_meta( $post->ID, '_thumbnail_id', true );
  
  return (int) apply_filters( 'post_thumbnail_id', $thumbnail_id, $post );
}

调用方法：

$args = array(
  'post_type'   => 'attachment',
  'numberposts' => -1,
  'post_status' => 'any',
  'post_parent' => $post->ID,
  'exclude'     => get_post_thumbnail_id(),
);

$attachments = get_posts( $args );

if ( $attachments ) {
  foreach ( $attachments as $attachment ) {
    echo apply_filters( 'the_title', $attachment->post_title );
    the_attachment_link( $attachment->ID, false );
  }
}