二维数组根据键值相加怎样根据每一个数组的键值相加？
Array ([0] => Array ([reg] => 0[regs] => 0[login] => 7[pay] => 0[buy] => 4[payment] => 11334.00[recharge] => 1[rechargea] => 3600.00)[1] => Array ([reg] => 1[regs] => 0[login] => 22[pay] => 0[buy] => 0[payment] => 0.00[recharge] => 0[rechargea] => 0.00)[2] => Array ([reg] => 0[regs] => 0[login] => 5[pay] => 0[buy] => 1[payment] => 376.00[recharge] => 0[rechargea] => 0.00)