Function on Booking form submission

you can see this hooks under events-manager/classes/em-booking.php

Awesome thanks for the help. I decided to do a really simple version of a spam blocker so hopefully it works.

Here is what I have

//add captcha to booking forms
function ddc_add_captcha() {
?>
	<p>
		<label for="arith">What is 1 + 1 ?</label>
		<input type="text" name="arith" id="arith" class="input" value="">
	</p>	

<?php
}
add_action('em_booking_form_footer', 'ddc_add_captcha');

//test if answer is correct
function ddc_test_captcha($this) {
	if( $_POST['arith'] != 2 ) {
		$this->errors[] = 'Please enter the Math Question Correctly.';
		return apply_filters('em_booking_get_post',count($this->errors) == 0,$this);
	}
}
add_action('em_booking_get_post_pre', 'ddc_test_captcha');

It seems like doing the above should throw an error but it does not. Does anyone have any suggestions why. I also went about this in a little bit different way

//test if answer is correct
function ddc_test_captcha($this) {
	if( $_POST['arith'] != 2 ) {
		$this->errors[] = 'Please enter the Math Question Correctly.';
		unset($_REQUEST);
		$override_availability = false;
	}
}
add_action('em_booking_get_post_pre', 'ddc_test_captcha');

In the above example it seems like I should be able to set an error and then bypass the long if statement in the EM_Booking->get_post() function. And in return that funciton should display an error but it doesn’t.

sorry can’t help you out with custom coding as per the support policy

https://eventsmanagerpro.com/support-policy/

I use this code to validate category field, when creating event:

function em_validate($result, $EM_Event){
if (is_user_logged_in() && $_REQUEST['event_categories'] == ''){
$EM_Event->add_error('Chose category...');
$result = false;
}
return $result;
}
add_filter('em_event_validate','em_validate', 1, 2);

Maybe there is something similar to em_booking_validate ??

yes, you can try to hook into em_booking_save filter.