Il existe plusieurs solutions
//strtotime date('d-m-Y', strtotime($value['date_msg']));
//datetime $date=new DateTime($value['date_msg']); $date=$date->format('d-m-Y');
au niveau sql
SELECT DATE_FORMAT(date, '%d/%m/%Y %Hh%imin%ss') AS date FROM table //renvoie DD/MM/YYYY HHhMMSS49s ( 11/03/2010 15h47min49)