AyeCode / invoicing

    return $invoice->get_transaction_id();

}

function wpinv_get_id_by_transaction_id( $key ) {

    global $wpdb;

    $invoice_id = $wpdb->get_var( $wpdb->prepare( "SELECT post_id FROM $wpdb->postmeta WHERE meta_key = '_wpinv_transaction_id' AND meta_value = %s LIMIT 1", $key ) );

    if ( $invoice_id != NULL )

        return $invoice_id;

    return 0;

}

function wpinv_get_invoice_meta( $invoice_id = 0, $meta_key = '_wpinv_payment_meta', $single = true ) {

    $invoice = new WPInv_Invoice( $invoice_id );

    return $display;

}

function wpinv_get_invoice_id_by_key( $key ) {

	global $wpdb;

	$invoice_id = $wpdb->get_var( $wpdb->prepare( "SELECT post_id FROM $wpdb->postmeta WHERE meta_key = '_wpinv_key' AND meta_value = %s LIMIT 1", $key ) );

	if ( $invoice_id != NULL )

		return $invoice_id;

	return 0;

}

function wpinv_can_view_receipt( $invoice_key = '' ) {

	$return = false;