blad - Notice: Uninitialized string offset: 0 in ... Opcje

[branies]

[PHP] pobierz, plaintext 
function TargetAlive ($data, $support)
                        {
                            $c = 0;
                            for ($p=2;$p<=15;$p++)
                            {
                                if($p!=14 AND $p!=6 AND $p!=7 AND $p!=13)
                                {
                                    $c += $data['a_'.$p]; // 75 linia - tu wystepuje notice
                                    for ($iii=0;$iii<count($support);++$iii)
                                    {
                                        $c += $support[$iii]['data']->jednostki[$p-1]->ilosc;
                                    }
                                }
                            }
                            return $c;
                        }
[PHP] pobierz, plaintext 

Jak zapobiec temu notisowi?

[erix]

isset