Selling courses via GetPaid

getpaid-link-to-invoice-course.php

<?php


function getpaid_example_link_to_item_course( $meta, $invoice ) {

    // Abort if the invoice is not paid.
    if ( ! $invoice->is_paid() ) {
        return $meta;
    }

    foreach ( $invoice->get_items() as $item ) {
        $course_id = get_post_meta( $item->get_id(), 'course_id', true );

        if ( ! empty( $course_id ) ) {
            $course_name = sanitize_text_field( get_the_title( $course_id ) );
            $course_link = esc_url( get_the_permalink( $course_id ) );

            // Link to the course.
            $meta[ 'course' ] = array(

                'label' => $course_name,
                'value' => sprintf(
                    '<a href="%s">%s</a>',
                    $course_link,
                    __( 'Enroll', 'invoicing' )
                ),

            );
        }

    }
    
    return $meta;
}
add_filter( 'getpaid_invoice_meta_data', 'getpaid_example_link_to_item_course', 10, 2 );