Question

wp_get_attachment_thumb_file( int $post_id )

Retrieve thumbnail for an attachment.

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description

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参数

$post_id

(int) (Optional) Attachment ID. Default 0.

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返回值

(string|false) False on failure. Thumbnail file path on success.

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源代码

File: wp-includes/post.php

function wp_get_attachment_thumb_file( $post_id = 0 ) {
	$post_id = (int) $post_id;
	if ( !$post = get_post( $post_id ) )
		return false;
	if ( !is_array( $imagedata = wp_get_attachment_metadata( $post->ID ) ) )
		return false;

	$file = get_attached_file( $post->ID );

	if ( !empty($imagedata['thumb']) && ($thumbfile = str_replace(basename($file), $imagedata['thumb'], $file)) && file_exists($thumbfile) ) {
		/**
		 * Filters the attachment thumbnail file path.
		 *
		 * @since 2.1.0
		 *
		 * @param string $thumbfile File path to the attachment thumbnail.
		 * @param int    $post_id   Attachment ID.
		 */
		return apply_filters( 'wp_get_attachment_thumb_file', $thumbfile, $post->ID );
	}
	return false;
}

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更新日志

Version	description
2.1.0	Introduced.

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相关函数

Uses

• wp-includes/plugin.php: apply_filters()
• wp-includes/post.php: wp_get_attachment_metadata()
• wp-includes/post.php: wp_get_attachment_thumb_file
• wp-includes/post.php: get_post()
• wp-includes/post.php: get_attached_file()

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Used By

• wp-includes/media.php: image_downsize()
• wp-includes/post.php: wp_get_attachment_thumb_url()

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User Contributed Notes