代码放在function.php内

步骤-文章删除到垃圾箱-垃圾箱内彻底删除，然后你就发现媒体库里那个文章内的图片已经不见了

// 删除文章同步删图片
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’);
// 结束