Questions about deleting multiple records

The problem of deleting multiple records the problem user management page, delete a single record I have mastered now, but how to delete multiple records at a time? I know that loops are used, but how do I obtain the id of the selected records? Which eldest brother can help me write down the complete code... My code: PHPcode & lt; SCRIPTlanguage = javascript & g the problem of deleting multiple records
Delete multiple records

On the user management page, I have mastered how to delete multiple records at a time?

I know that loops are used, but how do I obtain the id of the selected records?

Which eldest brother can help me write down the complete code...

My code:

PHP code