replace-email-variables-with-data.php

<?php
/**
 * Replace email variables with data in PMPro emails.
 *
 * You can add this recipe to your site by creating a custom plugin
 * or using the Code Snippets plugin available for free in the WordPress repository.
 * Read this companion article for step-by-step directions on either method.
 * https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */
function my_pmpro_replace_email_variables_with_data( $email ) {
	// Let's check for any remaining email variables and replace them with the data.
	if ( is_array( $email->data ) ) {
		foreach ( $email->data as $key => $value ) {
			if ( 'body' != $key ) {
				$email->body    = str_replace( '!!' . $key . '!!', $value, $email->body );
				$email->subject = str_replace( '!!' . $key . '!!', $value, $email->subject );
			}
		}
	}

	return $email;
}
add_filter( 'pmpro_email|_filter', 'my_pmpro_replace_email_variables_with_data', 99, 1 );