Date with more than 24hours

Hi

I am using command below to get datetime and storing it to varchar type field.

$datetime = $today[mday].'/'.$today[mon].'/'.$today[year].'    '.$horaReal.':'.$today[minutes].':'.$today[seconds];

I notice that I have error dates with more than 24 hours. e.g: 26:04.

Moises