wp_get_attachment_thumb_url( int $post_id )

检索附件缩略图的URL。
Retrieve URL for an attachment thumbnail.

目录锚点：#参数#源码#笔记

参数（Parameters）

源码（Source）

/**
 * Retrieve URL for an attachment thumbnail.
 *
 * @since 2.1.0
 *
 * @param int $post_id Optional. Attachment ID. Default 0.
 * @return string|false False on failure. Thumbnail URL on success.
 */
function wp_get_attachment_thumb_url( $post_id = 0 ) {
	$post_id = (int) $post_id;
	if ( !$post = get_post( $post_id ) )
		return false;
	if ( !$url = wp_get_attachment_url( $post->ID ) )
		return false;

	$sized = image_downsize( $post_id, 'thumbnail' );
	if ( $sized )
		return $sized[0];

	if ( !$thumb = wp_get_attachment_thumb_file( $post->ID ) )
		return false;

	$url = str_replace(basename($url), basename($thumb), $url);

	/**
	 * Filter the attachment thumbnail URL.
	 *
	 * @since 2.1.0
	 *
	 * @param string $url     URL for the attachment thumbnail.
	 * @param int    $post_id Attachment ID.
	 */
	return apply_filters( 'wp_get_attachment_thumb_url', $url, $post->ID );
}

笔记（Notes）

基本示例