EXCELIA_DBARR/custom/bbus/class/bbticketcounter.class.php

<?php
class Bbticketcounter
{

    private $facid;
    public $numberOfPrintedTickets = 0;

    public function __construct() {
        $this->facid = (GETPOST('id', 'int') ? GETPOST('id', 'int') : GETPOST('facid', 'int')); 
        $this->numberOfPrintedTickets = $this->getnumberOfPrintedTickets();
        return $this->numberOfPrintedTickets;
    }

    function getnumberOfPrintedTickets()
    {
        global $db;
        $sql = "SELECT count(distinct printing_date_timestamp) as count FROM llx_bbus_bbticketinvoiceprinting WHERE fk_facture = {$this->facid}";
        $data = $db->query($sql);
        $dataArray = pg_fetch_assoc($data);
        if (isset($dataArray['count'])) {
            return $dataArray['count'];
        }
        return 0;
    }
}