Event Espresso 4 – Helpful Functions

I’ve recently been working on a project using Event Espresso 4 and I’ve had to customize it quite extensively. I wrote a few functions that I think might be handy for others so I thought I would share them:

Get Event ID From Registration Code

I wrote this one to help me get the event information when a user clicks on a ‘cancel registration’ link. The reg code is more secure way to pass as a GET variable in a link than the user/event/registration id.

The Function

function get_eventid_of_reg_id($regid){

    global $wpdb;

    $query = "SELECT EVT_ID from wp_esp_registration where REG_code = '".$regid."'";
        
    $result = $wpdb->get_row($query);

    $result = $result->EVT_ID;

    return $result;

}

Usage Example

$regid = "axssa-12343";

$eventid = get_eventid_of_reg_id($regid);

$event_info_Object =  get_post($eventid);

// Returns a WP_Post object https://codex.WordPress.org/Class_Reference/WP_Post

Get Event Date

This one is handy if you have the event id and you are just looking for the date of the event.

The Function

function get_event_date($eventid, $format){

    global $wpdb;

    $query = "SELECT DTT_EVT_start from wp_esp_datetime where EVT_ID = '".$eventid."'";
        
    $result = $wpdb->get_row($query);

    $result = $result->DTT_EVT_start;

    $phpdate        = strtotime( $result );
    $mysqldate      = date( $format, $phpdate );
                                                    
    return $mysqldate;

}

Usage Example

$event_id = 34;

$event_date = get_event_date($event_id, 'Y-m-d');

echo $event_date;

Get the Status of the Registration From Registration Code

This one can be used to see the status of a particular registration. I wrote it to provide confirmation that a registration had been cancelled in a custom built ‘cancellation journey’.

The Function

function get_regid_status_from_regcode($regid){

    global $wpdb;

    $query = "SELECT STS_ID from wp_esp_registration where REG_code = '".$regid."'";
        
    $result = $wpdb->get_row($query);

    $result = $result->STS_ID;
                                                    
    return $result;  

}

This function returns a status code:

“RAP” (registration status of approved. This is the default behavior.)
“RCN” (registration status of cancelled.)
“RDC” (registration status of declined.)
“RIC” (registration status of incomplete.)
“RNA” (registration status of not approved.)
“RPP” (registration status of pending payment.)

Usage Example

$registration_code = "j9ojjsk-ookkd1";

$registration_status = get_regid_status_from_regcode($registration_code);

if($registration_status == "RCN"){
   echo "This registration is cancelled";
}

Get the Status of the Event From Registration ID

Same as above just using the Registration ID.

The Function

function get_regid_status_from_id($regid){

    global $wpdb;

    $query = "SELECT STS_ID from wp_esp_registration where REG_ID = '".$regid."'";
        
    $result = $wpdb->get_row($query);

    $result = $result->STS_ID;
                                                    
    return $result;  

}

This function returns a status code:

“RAP” (registration status of approved. This is the default behavior.)
“RCN” (registration status of cancelled.)
“RDC” (registration status of declined.)
“RIC” (registration status of incomplete.)
“RNA” (registration status of not approved.)
“RPP” (registration status of pending payment.)

Usage Example

$registration_id = 72;

$registration_status = get_regid_status_from_regcode($registration_id);

if($registration_status == "RCN"){
   echo "This registration is cancelled";
}

Get Registrant Details From Registration ID

This function gives you the all the registration details of a Registrant if you have the registration ID.

The Function

function get_registrant_from_reg_id($regid){

    global $wpdb;

    $query = "SELECT wp_esp_registration.ATT_ID,  ATT_fname as 'first_name', ATT_lname as 'last_name', ATT_email as 'email' from wp_esp_registration 
              join wp_esp_attendee_meta on wp_esp_attendee_meta.ATT_ID = wp_esp_registration.ATT_ID
              where REG_ID = '".$regid."'";
        
    $result = $wpdb->get_row($query);

    return $result;

}

This function returns an object with ‘first_name’, ‘last_name’ and ’email’ as the parameters.

Usage Example

$registration_id = 42;

$registration_detail = get_registrant_from_reg_id($registration_id);

echo "The registrants first name is ". $registration_detail->first_name. "<br>";
echo "The registrants last name is ". $registration_detail->last_name. "<br>";
echo "The registrants email adddress is ". $registration_detail->email. "<br>";