add-instructions-to-pmpro-add-member-added-email-data.php

<?php
/**
 * Add !!instructions!! email variable data to the "add_member_added"
 * email data if the payment method is "check".
 *
 * 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 add_instructions_to_pmpro_add_member_added_email_data( $data, $email ) {

	if ( 'add_member_added' === $email->template ) {
		$invoice_id = null;

		// Get payment method from invoice
		if ( isset( $data['invoice_id'] ) ) {
			$invoice_id = $data['invoice_id'];
		}

		if ( ! empty( $invoice_id ) ) {
			$invoice        = new MemberOrder( $invoice_id );
			$payment_method = $invoice->gateway;

			if ( false !== strpos( $payment_method, 'check' ) ) {
				$data['instructions'] = wpautop( pmpro_getOption( 'instructions' ) );
			}
		}
	}
	return $data;
}
add_filter( 'pmpro_email_data', 'add_instructions_to_pmpro_add_member_added_email_data', 10, 2 );