PHP转盘抽奖接口实例

<?php  
/*session_start(); 
if(!isset($_SESSION['zaszh_user_id'])){ 
    echo json_encode(array('status'=>'error','msg'=>'连接超时，请重新打开页面。')); 
    exit; 
} 
$user_id = $_SESSION['zaszh_user_id'];*/  
  
$user_id = 1; // 测试用  
  
// 转盘区域  
$arr_area = array(  
    '0' => array('min_angle'=>1,'max_angle'=>45,'prize'=>'小米'),
    '1' => array('min_angle'=>46,'max_angle'=>90,'prize'=>'拍立得'),
    '2' => array('min_angle'=>91,'max_angle'=>135,'prize'=>'10元话费'), 
    '3' => array('min_angle'=>136,'max_angle'=>180,'prize'=>'5元话费'), 
    '4' => array('min_angle'=>181,'max_angle'=>225,'prize'=>'谢谢参与'),
    '5' => array('min_angle'=>226,'max_angle'=>270,'prize'=>'谢谢参与'),
    '6' => array('min_angle'=>271,'max_angle'=>315,'prize'=>'谢谢参与'),
    '7' => array('min_angle'=>316,'max_angle'=>360,'prize'=>'谢谢参与')  
);  
  
// 选定区域  
$area_selected = array();  
// 随机抽取  
$num_rand = mt_rand(1,10);  
switch($num_rand){  
    // 小米  
    case 1: $area_selected = $arr_area[0]; break;  
    // 拍立得  
    case 2: $area_selected = $arr_area[1]; break;  
    // 10元话费  
    case 3: $area_selected = $arr_area[2]; break;  
    // 5元话费  
    case 4: $area_selected = $arr_area[3]; break;  
    // 谢谢参与  
    default:  
        switch(mt_rand(1,4)){  
            case 1: $area_selected = $arr_area[4]; break;  
            case 2: $area_selected = $arr_area[5]; break;  
            case 3: $area_selected = $arr_area[6]; break;  
            case 4: $area_selected = $arr_area[7]; break;  
        }  
        break;  
}  
echo $area_selected['prize'];  
  
require('connect_database.php');  
// 扣除答题积分  
$mysqli->query("update zaszh_user set answer_points=answer_points-5 where id='{$user_id}' and answer_points>=5");  
if($mysqli->affected_rows){  
    // 有积分  
    // 记录积分消耗  
    $mysqli->query("insert into zaszh_answer_points_consume(user_id,points_consume,consume_for,create_date) values('{$user_id}',5,'lottery',unix_timestamp(now()))");  
    switch($area_selected['prize']){  
        case '小米':  
            $mysqli->query("update zaszh_prize_surplus set surplus=surplus-1 where prize='小米' and surplus>0");  
            if($mysqli->affected_rows){  
                // 有剩余  
                $mysqli->query("insert into zaszh_award(user_id,prize,create_date) values('{$user_id}','小米',unix_timestamp(now()))");  
                if($mysqli->affected_rows){  
                    echo json_encode(array('status'=>'success','msg'=>'小米'));  
                }else{  
                    // 获奖失败  
                }  
            }else{  
                // 无剩余  
            }  
            break;  
        case '拍立得':  
            $mysqli->query("update zaszh_prize_surplus set surplus=surplus-1 where prize='拍立得' and surplus>0");  
            if($mysqli->affected_rows){  
                // 有剩余  
                $mysqli->query("insert into zaszh_award(user_id,prize,create_date) values('{$user_id}','拍立得',unix_timestamp(now()))");  
                if($mysqli->affected_rows){  
                    echo json_encode(array('status'=>'success','msg'=>'拍立得'));  
                }else{  
                    // 获奖失败  
                }  
            }else{  
                // 无剩余  
            }  
            break;  
        case '10元话费':  
            $mysqli->query("update zaszh_telephone_charge_surplus set charge_surplus=charge_surplus-10 where date=substring(now(),1,10) and charge_surplus>=10");  
            if($mysqli->affected_rows){  
                // 有剩余  
                $mysqli->query("insert into zaszh_award(user_id,prize,create_date) values('{$user_id}','10元话费',unix_timestamp(now()))");  
                if($mysqli->affected_rows){  
                    echo json_encode(array('status'=>'success','msg'=>'10元话费'));  
                }else{  
                    // 获奖失败  
                }  
            }else{  
                // 无剩余  
            }  
            break;  
        case '5元话费':  
            $mysqli->query("update zaszh_telephone_charge_surplus set charge_surplus=charge_surplus-5 where date=substring(now(),1,10) and charge_surplus>=5");  
            if($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  
            }  
            break;  
        default:  
            echo json_encode(array('status'=>'success','msg'=>'谢谢参与'));  
    }  
}else{  
    // 无积分  
    echo json_encode(array('status'=>'error','msg'=>'您的积分不足。'));  
}  
$mysqli->close();