$per2 = $tmonths[date('n',mktime(0,0,0,date('m')-2,1,date('Y')))];
$per3 = $tmonths[date('n',mktime(0,0,0,date('m')-3,1,date('Y')))];
$per4 = $tmonths[date('n',mktime(0,0,0,date('m')-4,1,date('Y')))];
$per2 = $tmonths[date('n',mktime(0,0,0,date('m')-2,1,date('Y')))];
$per3 = $tmonths[date('n',mktime(0,0,0,date('m')-3,1,date('Y')))];
$per4 = $tmonths[date('n',mktime(0,0,0,date('m')-4,1,date('Y')))];