MemberPress Affiliate Program: Complete Integration Guide | AffiliateBase

<?php
// Add to your theme's functions.php or custom plugin
// Track MemberPress membership sign-ups
add_action('mepr-event-transaction-completed', 'affiliatebase_track_memberpress_signup', 10, 1);

function affiliatebase_track_memberpress_signup($event) {
    $transaction = $event->get_data();
    $user = $transaction->user();
    $membership = $transaction->product();
    
    // Get affiliate ID from cookie or URL parameter
    $affiliate_id = isset($_COOKIE['affiliate_id']) ? $_COOKIE['affiliate_id'] : null;
    
    if ($affiliate_id) {
        $api_key = get_option('affiliatebase_api_key');
        
        wp_remote_post('https://api.affiliatebase.com/track-conversion', [
            'headers' => [
                'Content-Type' => 'application/json',
                'Authorization' => 'Bearer ' . $api_key,
            ],
            'body' => json_encode([
                'affiliateId' => $affiliate_id,
                'type' => 'membership_signup',
                'amount' => $transaction->total,
                'currency' => $transaction->currency,
                'customerId' => $user->ID,
                'subscriptionId' => $transaction->subscription_id,
                'metadata' => [
                    'membership_id' => $membership->ID,
                    'membership_name' => $membership->post_title,
                    'transaction_id' => $transaction->id,
                ],
            ]),
        ]);
    }
}

// Track subscription renewals
add_action('mepr-event-recurring-transaction-completed', 'affiliatebase_track_memberpress_renewal', 10, 1);

function affiliatebase_track_memberpress_renewal($event) {
    $transaction = $event->get_data();
    $subscription = $transaction->subscription();
    
    // Get original affiliate from subscription metadata
    $affiliate_id = get_post_meta($subscription->id, 'affiliatebase_affiliate_id', true);
    
    if ($affiliate_id) {
        // Track renewal conversion
        // Similar code as above but with type: 'membership_renewal'
    }
}