$user_id = 1; // 测试用
$exchange_points = intval($_GET['exchange_points']);

require('connect_database.PHP');
// 扣除答题积分
$MysqLi->query("update zaszh_user set answer_points=answer_points-{$exchange_points} where id='{$user_id}' and answer_points>={$exchange_points}");
if($MysqLi->affected_rows){
// 有积分
switch($exchange_points){
// 5元话费
case 200:
$MysqLi->query("update zaszh_telephone_charge_surplus set charge_surplus=charge_surplus-5 where date=substring(now(),1,10) and charge_surplus>=5");
if($MysqLi->affected_rows){
// 有剩余
$MysqLi->query("insert into zaszh_award(user_id,prize,create_date) values('{$user_id}','5元话费',unix_timestamp(now()))");
if($MysqLi->affected_rows){
echo json_encode(array('status'=>'success','msg'=>'5元话费'));
}else{
// 获奖失败
}
}else{
// 无剩余
// 恢复答题积分
$MysqLi->query("update zaszh_user set answer_points=answer_points+{$exchange_points} where id='{$user_id}'");
}
break;
// 10元话费
case 400:
$MysqLi->query("update zaszh_telephone_charge_surplus set charge_surplus=charge_surplus-10 where date=substring(now(),10) and charge_surplus>=10");
if($MysqLi->affected_rows){
// 有剩余
$MysqLi->query("insert into zaszh_award(user_id,'10元话费','msg'=>'10元话费'));
}else{
// 获奖失败
}
}else{
// 无剩余
// 恢复答题积分
$MysqLi->query("update zaszh_user set answer_points=answer_points+{$exchange_points} where id='{$user_id}'");
}
break;
}

// 记录积分消耗
$MysqLi->query("insert into zaszh_answer_points_consume(user_id,points_consume,consume_for,'{$exchange_points}','exchange',unix_timestamp(now()))");
}else{
// 无积分
echo json_encode(array('status'=>'error','msg'=>'您的积分不足。'));
}
$MysqLi->close();