php求和

array_sum（）数组求和

$a = array(5,15,25);

array_sum（$a）;    

echo '$aa';// 45

sql sum()求和

$sal="SELECT SUM(money) as num FROM dingdan where email0='45' or email5='645'";

$link=mysql_query($sql);

whle($value=mysql_fetch_array($link))

{ echo $value['num'];}