WordPress怎样实行删掉文章时一起删除图片包括的附件

只需将底下的 PHP 代码加入到：themes/xxx/functions.php 底部就行了

//删除文章时删除图片附件开始
function delete_post_and_attachments($post_ID) {
    global $wpdb;
    //删除特色图片
    $thumbnails = $wpdb->get_results( "SELECT * FROM $wpdb->postmeta WHERE meta_key = '_thumbnail_id' AND post_id = $post_ID" );
    foreach ( $thumbnails as $thumbnail ) {
        wp_delete_attachment( $thumbnail->meta_value, true );
    }
    //删除图片附件
    $attachments = $wpdb->get_results( "SELECT * FROM $wpdb->posts WHERE post_parent = $post_ID AND post_type = 'attachment'" );
    foreach ( $attachments as $attachment ) {
        wp_delete_attachment( $attachment->ID, true );
    }
    $wpdb->query( "DELETE FROM $wpdb->postmeta WHERE meta_key = '_thumbnail_id' AND post_id = $post_ID" );
}
add_action('before_delete_post', 'delete_post_and_attachments');
//删除文章时删除图片附件

值得注意的是：当你在删除文章时先执行函数内容，删除特色图片以及图片附件，但是如果在使用action delete_post而不是before_delete_post将导致删除文章后因媒体附件与文章关联已取消而无法正确删除。