Prevent using email multiple times per event

For wordpress users, you could use the placeholder #_ADDBOOKINGFORM_IF_NOT_REGISTERED , which will only show the booking form if not already registered.

If it is for external guests, you need to do an evaluation of the user at the moment they book, you can use the filter eme_eval_booking_form_post_filter for that, see https://www.e-dynamics.be/wordpress/?cat=41 for an example of that filter that does exactly what you want.

Hi Frank, I appreciate your quick response. I’m not that experience with php or with your plugin. Can you elaborate more how do I apply the eme_eval_booking_form_post_filter? I already checked the link that you gave but Im not sure if what I did is correct. I added this to the eme_filters.php

add_filter(’eme_eval_booking_post_filter’,’do_my_stuff’);
function do_my_stuff($event) {
$event_id=$event[‘event_id’];
$already_registered=0;

// only do a specific event
if ($event_id != 5) return;

// get all attendees
$attendees = eme_get_attendees_for($event_id);
foreach ( $attendees as $attendee ) {
// $attendee[‘person_email’], $attendee[‘person_name’]
$bookerEmail = eme_sanitize_html(stripslashes_deep($_POST[‘bookerEmail’]));
$bookerName = eme_sanitize_html(stripslashes_deep($_POST[‘bookerName’]));
if ($bookerEmail == $attendee[‘person_email’] && $bookerName == $attendee[‘person_name’])
$already_registered=1;
}

if (!$already_registered) {
// eval is success
return array(0=>1,1=>”);
} else {
// bad form entry
return array(0=>0,1=>’Already registered’);
}
}

but when I tried running it, it did not run the filter? Do I need to add “eme_eval_booking_form_post_filter” somewhere? Sorry for the newbie question.

Such code needs to be added to the functions.php file of your theme, you should not change plugin code.

Sorry about that fran, like what I said, I’m a noob. I added it on eme_function.php but nothing happened.:(

Like I said: not change anything in the plugin, but in your theme.
Change the file functions.php in your theme.

It didn’t work:( Thanks for your patience franky…

Of course you need to evaluate the code a bit. In the example I gave, it was limited to 1 event:
if ($event_id != 5) return;
If you want it for every event, remove that line.