I have constructed query as a String from different variables (I have also tried with prepare/execute method).
WHen I put that string into (query) i doesn't get any results. But when I print it on screen, than copy/paste it into code and run it again, query is executed without problem.
$datumefekta = $row['datumefekta'];
$dpo = $row['dpo'];
$valpla = $row['valpla'];
$prihod = $row['prihod'];
$logname = $row['logname'];
$datumknj = $row['datumknj'];
$comp = $row['comp'];
$referentFak = $logname." (".$comp.")";
$quTest = "UPDATE BusinessFlow SET vremeSlanjaFE = '".$datumefekta."', referentFakt = '".$referentFak."', vremeFakturisanja = '".$datumknj."', sstatus = 'B' WHERE brojRacuna = '".$racun['brojRacuna']."'";
$sql->query($quTest);
$sql -> query("UPDATE BusinessFlow SET vremeSlanjaFE = '2020-11-12 00:00:00.0', referentFakt = 'username', vremeFakturisanja = '2020-11-12 09:06:27.0', sstatus = 'A' WHERE brojRacuna = '01/20162938'");