1. M('users_coin')->where("uid={$uid} and type='{$type}'")->setField(array('available'=>array('exp','available-'.$total_amont),'c2c_freeze'=>array('exp','c2c_freeze+'.$total_amont)));
2. $data['trans_amount']=array('exp','trans_amount+'.$amount);
$data['trans_count'] =array('exp','trans_count+1');
M('config')->where('id=1')->save($data);
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