Function wp_attachment_order_update

Moves an attachment before another given attachment in the order table.

Returns: boolean True or array with error strings
Located at attachment.php

Parameters summary

`integer`	`$folderId`	The folder id where the attachment exists
`integer`	`$attachmentId`	The attachment which should be moved
`integer`	`$nextId`	The attachment next to the currentId, if it is false the currentId should be moved to the end of table.
`integer`	`$lastIdInView = false`	If you have pagination, you can pass the last id from this view