mypmro-qr-code-return-member-number.php

<?php
/**
 * This recipe will return a member number when scanning a QR code.
 *
 * Set your shortcode to [pmpro_membership_card qr_code='true' qr_data='other'] 
 * for this filter to take effect.
 *
 * 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 mypmro_membership_card_return_member_number( $pmpro_membership_card_user, $option ){

	//Checking if PMPro is active
	if( !function_exists( 'pmpro_hasMembershipLevel' ) ){
		return;
	}

	if( $option == 'other' ){

		$member_number = get_user_meta( $pmpro_membership_card_user->ID, 'member_number', true );

		if( $member_number !== "" ){
			return $member_number;
		}

	}	

}
add_filter( 'pmpro_membership_card_qr_data_other', 'mypmro_membership_card_return_member_number', 10, 2 );