ecommerce-tracking-memberpress.php

<?php
// Add Google Analytics eCommerce tracking for MemberPress
function echo_ga_tracking_script() {
   global $wpdb;
   if(isset($_GET['membership']) && isset($_GET['trans_num'])) {
     // get transaction info for one time payments
     $txn = MeprTransaction::get_one_by_trans_num($_GET['trans_num']);

      // check if it has subscription info attached 
      if(isset($_GET['subscr_id']) && ($_GET['subscr_id'] == $_GET['trans_num'])) {
      // Get subscription id from the subscr_id
      $sid = $wpdb->get_var( "SELECT id FROM {$wpdb->prefix}mepr_subscriptions WHERE subscr_id LIKE '{$_GET['subscr_id']}'" );

      // get array of transactions for recurring payments
      //$txn = MeprTransaction::get_one_by_subscription_id($sid);
      $txns = MeprTransaction::get_all_by_subscription_id($sid);

      // For Stripe CC, 2 transactions are added: txn_type = subscription_confirmation and txn_type = payment
      // We want the 2nd one that holds the payment amount
      // For paypal express there is one transaction with txn_type = subscription_confirmation that gets updated after the first load of the thank-you page
      // with payment info, so we need to do a page reload in that case
      if ($txns[0]->txn_type == 'payment') {
          $txn = $txns[0];
      }
      else if ( ($txns[0]->txn_type == 'subscription_confirmation') && isset($txns[1]) && ($txns[1]->txn_type == 'payment') )  {
        $txn = $txns[1];
      }
      else { // reload thank-you page to get the updated transaction info for Paypal payments
        echo '<script>setTimeout((function() { window.location.reload(true); }), 5000);';
        echo 'document.getElementById("et-boc").innerHTML = "<div style=\"padding:10%;text-align:center;font-size:2em;\">Please keep this window open until we finish processing your payment...</div>";</script>';
      }
      } // end isset $_GET['subscr_id']
    } // end isset($_GET['membership']
  ?>
   <script>
         (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
 (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
 m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
 })(window,document,'script','https://www.google-analytics.com/analytics.js','ga');

          ga('create', 'UA-xxxx-x', 'auto');
 <?php
	if(isset($txn->id) && $txn->id > 0 && ($txn->txn_type == 'payment')) {
	  //var_dump($txn);
	  //Echo the script 
      ?>

          ga('require', 'ecommerce');
          ga('ecommerce:addTransaction', {
            id: '<?php echo $txn->trans_num; ?>', // Transaction ID - this is normally generated by your system.
            affiliation: 'XXXXXXXXXXX', // Affiliation or store name
            revenue: '<?php echo $txn->total; ?>', // Grand Total
            shipping: '0', // Shipping cost
            tax: '<?php echo $txn->tax_amount; ?>'
          }); // Tax.
          ga('ecommerce:addItem', {
            id: '<?php echo $txn->trans_num; ?>', // Transaction ID.
            sku: '', // SKU/code.
            name: '<?php echo urldecode($_GET['membership']); ?>', // Product name.
            category: '', // Category or variation.
            price: '<?php echo $txn->amount; ?>', // Unit price.
            quantity: '1'
          });
          ga('ecommerce:send');

      <?php
    } // end isset txn

  ?>
          ga('send', 'pageview');
     </script>
  <?php
  //echo "<!-- ecom tracking ";
  //var_dump($txn);
  //var_dump($txns);
  //echo "-->";	
}
add_action('wp_footer', 'echo_ga_tracking_script', 20);
?>