Problems updating mySQL DB
ref,fname,lname,event1,event2,event3.
ref is the ID (autonumber).

$event1[] = $_POST['event1'];
$event2[] = $_POST['event2'];
$event3[] = $_POST['event3'];

id, first name, last name, event 1, event 2, event 3

<input type='checkbox' name='event1[]' value='3'>

<input type="checkbox" name="events[]" value="1" />
<input type="checkbox" name="events[]" value="2" />
<input type="checkbox" name="events[]" value="3" />
<input type="checkbox" name="events[]" value="4" />
<input type="checkbox" name="events[]" value="5" />

Array (
  0 => 1
  1 => 2
  2 => 5
)

echo '<input type="checkbox" name="event1[' . $row['ref'] .']" value="1" />';

$event1 = $_POST['event1'];