删除属于给定附件的所有文件。

原型

wp_delete_attachment_files( int $post_id, array $meta, array $backup_sizes, string $file )

参数

$post_id (int) (Required) 附件ID。

$meta (array) (Required) 附件的元数据。

$backup_sizes (array) (Required) 附件备份映像的元数据。

$file (string) (Required) 附件文件的绝对路径。

返回值

(bool)  成功时是真的,失败时是假的。

源文件

路径:wp-includes/post.php

<?php
...
function wp_delete_attachment_files( $post_id, $meta, $backup_sizes, $file ) {
	global $wpdb;
	$uploadpath = wp_get_upload_dir();
	$deleted    = true;
	if ( ! empty( $meta['thumb'] ) ) {
		// Don't delete the thumb if another attachment uses it.
		if ( ! $wpdb->get_row( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE meta_key = '_wp_attachment_metadata' AND meta_value LIKE %s AND post_id <> %d", '%' . $wpdb->esc_like( $meta['thumb'] ) . '%', $post_id ) ) ) {
			$thumbfile = str_replace( basename( $file ), $meta['thumb'], $file );
			if ( ! empty( $thumbfile ) ) {
				$thumbfile = path_join( $uploadpath['basedir'], $thumbfile );
				$thumbdir  = path_join( $uploadpath['basedir'], dirname( $file ) );
				if ( ! wp_delete_file_from_directory( $thumbfile, $thumbdir ) ) {
					$deleted = false;
				}
			}
		}
	}
	// Remove intermediate and backup images if there are any.
	if ( isset( $meta['sizes'] ) && is_array( $meta['sizes'] ) ) {
		$intermediate_dir = path_join( $uploadpath['basedir'], dirname( $file ) );
		foreach ( $meta['sizes'] as $size => $sizeinfo ) {
			$intermediate_file = str_replace( basename( $file ), $sizeinfo['file'], $file );
			if ( ! empty( $intermediate_file ) ) {
				$intermediate_file = path_join( $uploadpath['basedir'], $intermediate_file );
				if ( ! wp_delete_file_from_directory( $intermediate_file, $intermediate_dir ) ) {
					$deleted = false;
				}
			}
		}
	}
	if ( is_array( $backup_sizes ) ) {
		$del_dir = path_join( $uploadpath['basedir'], dirname( $meta['file'] ) );
		foreach ( $backup_sizes as $size ) {
			$del_file = path_join( dirname( $meta['file'] ), $size['file'] );
			if ( ! empty( $del_file ) ) {
				$del_file = path_join( $uploadpath['basedir'], $del_file );
				if ( ! wp_delete_file_from_directory( $del_file, $del_dir ) ) {
					$deleted = false;
				}
			}
		}
	}
	if ( ! wp_delete_file_from_directory( $file, $uploadpath['basedir'] ) ) {
		$deleted = false;
	}
	return $deleted;
}
...
?>

其他

英文文档:https://developer.wordpress.org/reference/functions/wp_delete_attachment_files/