Events Manager - custom placeholder demos - Demonstration of static and dynamic custom placeholder tags for Events Manager. https://www.damiencarbery.com/2025/09/events-manager-custom-placeholders/

em-custom-placeholder.php

<?php
/*
 * Plugin Name: Events Manager - custom placeholder demos
 * Description: Demonstration of static and dynamic custom placeholder tags for Events Manager.
 * Plugin URI: https://www.damiencarbery.com/2025/09/events-manager-custom-placeholders/
 * Author: Damien Carbery
 * Author URI: https://www.damiencarbery.com
 * Requires Plugins: events-manager
 * Version: 0.1.20250908
*/

defined( 'ABSPATH' ) || exit;


// {closing_soon} placeholder.
add_action( 'em_event_output_show_condition', 'dcwd_show_closing_soon_placeholder', 10, 4 );
function dcwd_show_closing_soon_placeholder( $show, $condition, $full_match, $event ){
	if ( 'closing_soon' == $condition ) {
		$full_day = 86400; // 86,400 seconds = 24 hours.
		// Check that bookings are open and it has a booking closing time set.
		if ( $event->get_bookings()->is_open() && $event->get_bookings()->has_open_time() ) {
			if ( $event->rsvp_end()->getTimestamp() - time() < $full_day ) {
				return true;
			}
		}
	}

    return $show;
}


// {tickets_remaining} placeholder.
add_action( 'em_event_output_show_condition', 'dcwd_show_tickets_remaining_placeholder', 10, 4 );
function dcwd_show_tickets_remaining_placeholder( $show, $condition, $full_match, $event ){
	if ( 'tickets_remaining' == $condition ) {
		if ( $event->event_rsvp && $event->get_bookings()->get_available_spaces() > 0 ) {
			$avail_spaces = $event->get_bookings()->get_available_spaces();
			//$event->get_spaces() - $event->get_booked_spaces();
			$spaces = $event->get_spaces();
			//error_log( sprintf( 'Avail: %d, spaces: %d; Percent: %d; %s', $avail_spaces, $spaces, intval( $avail_spaces * 100 / $spaces ), $event->event_name ) );
			$avail_spaces_percent = intval( $avail_spaces * 100 / $spaces );
			if ( $avail_spaces_percent <= 20 ) {
				return true;
			}
		}
	}

    return $show;
}


// {ticket_count} placeholder - show it.
add_action( 'em_event_output_show_condition', 'dcwd_show_ticket_count_placeholder', 1, 4 );
function dcwd_show_ticket_count_placeholder( $show, $condition, $full_match, $event ){
	if ( 'ticket_count' == $condition ) { return true; }

	return $show;
}


// {ticket_count} placeholder - process it.
add_filter('em_event_output_condition', 'dcwd_process_ticket_count_placeholder', 10, 4 );
function dcwd_process_ticket_count_placeholder( $replacement, $condition, $conditionals_key, $event) {
	if ( 'ticket_count' == $condition ) {
		// Check that bookings are open and it's not booked out.
		if ( $event->event_rsvp && $event->get_bookings()->is_open() && $event->get_bookings()->get_available_spaces() > 0 ) {
			return sprintf( $replacement, $event->get_bookings()->get_available_spaces() );
		}
		return '';
	}
	
	return $replacement;
}