How to delete multiple rows from mysql database with checkbox using PHP?

Question

I try to delete my data in \"admin\" database, but the delete button does not function.

This is my top part

Answer 1

                          'Vendor',
                                'orderby' => 'user_nicename',
                                'exclude' => $user_id.',1',
                                'order' => 'ASC'
                            );
                            $subscribers = get_users($args1);                                        foreach ($subscribers as $user) {
                                $fvendorck = $wpdb->get_row("select * from wp_vandor where parent_id = '".$user_id."' and child_id = '".$user->id."'");
                                $isfavvendor = $fvendorck->child_id;
                             if(!empty($isfavvendor)) {
                             ?>
                                
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