这篇文章主要介绍了PHP转盘抽奖接口的实现方法,实例分析了随机抽奖接口的实现原理与对应数据库操作的技巧,需要的朋友可以参考下

本文实例讲述了PHP转盘抽奖接口的实现方法。分享给大家供大家参考。具体如下：

这里的转盘抽奖随机返回一个转盘角度，概率可自己定义

lottery_get.php接口文件如下：

1. <?php
2. /*session_start();
3. if(!isset($_SESSION['zaszh_user_id'])){
4. echo json_encode(array('status'=>'error','msg'=>'连接超时，请重新打开页面。'));
5. exit;
6. }
7. $user_id = $_SESSION['zaszh_user_id'];*/
8. $user_id = 1; // 测试用
9. // 转盘区域
10. $arr_area = array(
11. '0' => array('min_angle'=>1,'max_angle'=>45,'prize'=>'小米'),
12. '1' => array('min_angle'=>46,'max_angle'=>90,'prize'=>'拍立得'),
13. '2' => array('min_angle'=>91,'max_angle'=>135,'prize'=>'10元话费'),
14. '3' => array('min_angle'=>136,'max_angle'=>180,'prize'=>'5元话费'),
15. '4' => array('min_angle'=>181,'max_angle'=>225,'prize'=>'谢谢参与'),
16. '5' => array('min_angle'=>226,'max_angle'=>270,'prize'=>'谢谢参与'),
17. '6' => array('min_angle'=>271,'max_angle'=>315,'prize'=>'谢谢参与'),
18. '7' => array('min_angle'=>316,'max_angle'=>360,'prize'=>'谢谢参与')
19. );
20. // 选定区域
21. $area_selected = array();
22. // 随机抽取
23. $num_rand = mt_rand(1,10);
24. switch($num_rand){
25. // 小米
26. case 1: $area_selected = $arr_area[0]; break;
27. // 拍立得
28. case 2: $area_selected = $arr_area[1]; break;
29. // 10元话费
30. case 3: $area_selected = $arr_area[2]; break;
31. // 5元话费
32. case 4: $area_selected = $arr_area[3]; break;
33. // 谢谢参与
34. default:
35. switch(mt_rand(1,4)){
36. case 1: $area_selected = $arr_area[4]; break;
37. case 2: $area_selected = $arr_area[5]; break;
38. case 3: $area_selected = $arr_area[6]; break;
39. case 4: $area_selected = $arr_area[7]; break;
40. }
41. break;
42. }
43. echo $area_selected['prize'];
44. require('connect_database.php');
45. // 扣除答题积分
46. $mysqli->query("update zaszh_user set answer_points=answer_points-5 where and answer_points>=5");
47. if($mysqli->affected_rows){
48. // 有积分
49. // 记录积分消耗
50. $mysqli->query("insert into zaszh_answer_points_consume(user_id,points_consume,consume_for,create_date) values('{$user_id}',5,'lottery',unix_timestamp(now()))");
51. switch($area_selected['prize']){
52. case '小米':
53. $mysqli->query("update zaszh_prize_surplus set surplus=surplus-1 where prize='小米' and surplus>0");
54. if($mysqli->affected_rows){
55. // 有剩余
56. $mysqli->query("insert into zaszh_award(user_id,prize,create_date) values('{$user_id}','小米',unix_timestamp(now()))");
57. if($mysqli->affected_rows){
58. echo json_encode(array('status'=>'success','msg'=>'小米'));
59. }else{
60. // 获奖失败
61. }
62. }else{
63. // 无剩余
64. }
65. break;
66. case '拍立得':
67. $mysqli->query("update zaszh_prize_surplus set surplus=surplus-1 where prize='拍立得' and surplus>0");
68. if($mysqli->affected_rows){
69. // 有剩余
70. $mysqli->query("insert into zaszh_award(user_id,prize,create_date) values('{$user_id}','拍立得',unix_timestamp(now()))");
71. if($mysqli->affected_rows){
72. echo json_encode(array('status'=>'success','msg'=>'拍立得'));
73. }else{
74. // 获奖失败
75. }
76. }else{
77. // 无剩余
78. }
79. break;
80. case '10元话费':
81. $mysqli->query("update zaszh_telephone_charge_surplus set charge_surplus=charge_surplus-10 where date=substring(now(),1,10) and charge_surplus>=10");
82. if($mysqli->affected_rows){
83. // 有剩余
84. $mysqli->query("insert into zaszh_award(user_id,prize,create_date) values('{$user_id}','10元话费',unix_timestamp(now()))");
85. if($mysqli->affected_rows){
86. echo json_encode(array('status'=>'success','msg'=>'10元话费'));
87. }else{
88. // 获奖失败
89. }
90. }else{
91. // 无剩余
92. }
93. break;
94. case '5元话费':
95. $mysqli->query("update zaszh_telephone_charge_surplus set charge_surplus=charge_surplus-5 where date=substring(now(),1,10) and charge_surplus>=5");
96. if($mysqli->affected_rows){
97. // 有剩余
98. $mysqli->query("insert into zaszh_award(user_id,prize,create_date) values('{$user_id}','5元话费',unix_timestamp(now()))");
99. if($mysqli->affected_rows){
100. echo json_encode(array('status'=>'success','msg'=>'5元话费'));
101. }else{
102. // 获奖失败
103. }
104. }else{
105. // 无剩余
106. }
107. break;
108. default:
109. echo json_encode(array('status'=>'success','msg'=>'谢谢参与'));
110. }
111. }else{
112. // 无积分
113. echo json_encode(array('status'=>'error','msg'=>'您的积分不足。'));
114. }
115. $mysqli->close();