php抢购秒杀逻辑
转载 原地址：https://www.tongpankt.com/7286
1 <?php 2 /** 3 * 抢购的处理逻辑 4 */ 5 6 include 'init.php'; 7 8 $TEMPLATE['type'] = 'buy'; 9 $TEMPLATE['pageTitle'] = '抢购'; 10 11 $active_model = new \model\Active(); 12 $goods_model = new \model\Goods(); 13 14 // 参数的处理 15 $active_id = getReqInt('active_id'); 16 $goods_id = getReqInt('goods_id'); 17 $goods_num = getReqInt('goods_num'); 18 $sign_data = $_POST['sign_data']; 19 $question_sign = $_POST['question_sign']; 20 $ask = $_POST['ask']; 21 $answer = $_POST['answer']; 22 $action = isset($_POST['action']) ? $_POST['action'] : false; 23 24 if ('buy_cart' == $action) { 25 $goods_num = $_POST['num'][0]; 26 } 27 $client_ip = getClientIp(); 28 29 // 1 验证用户是否登录 30 if (!$login_userinfo || !$login_userinfo['uid']) { 31 $result = array('error_no' => '101', 'error_msg' => '用户登录之后才可以参与'); 32 show_result($result); 33 } 34 $uid = $login_userinfo['uid']; 35 $username = $login_userinfo['username']; 36 // 2 验证参数是否正确、合法 37 if (!$active_id || !$goods_id 38 || !$goods_num || !$question_sign) { 39 $result = array('error_no' => '102', 'error_msg' => '参数提交异常'); 40 show_result($result); 41 } 42 // 3.1 验证活动状态信息 43 $status_check = false; 44 $str_sign_data = unsignQuestion($sign_data); 45 $sign_data_info = json_decode($str_sign_data, true); 46 // 时间不能超过当前时间5分钟，IP和用户保持不变 47 if ($sign_data_info 48 && $sign_data_info['now'] < $now 49 && $sign_data_info['now'] > $now - 300 50 && $sign_data_info['ip'] == $client_ip 51 && $sign_data_info['uid'] == $uid 52 ) { 53 $status_check = true; 54 } 55 if (!$status_check) { 56 $result = array('error_no' => '103', 'error_msg' => '用户校验值验证没有通过'); 57 show_result($result); 58 } 59 // 3.2 验证问答信息是否正确 60 $question_check = false; 61 $str_question = unsignQuestion($question_sign); 62 $question_info = json_decode(trim($str_question), true); 63 if ($str_question && $question_info) { 64 if ($question_info['ask'] == $ask 65 && $question_info['answer'] == $answer 66 && $question_info['aid'] == $active_id 67 && $question_info['uid'] == $uid 68 && $question_info['ip'] == $client_ip 69 && $question_info['now'] > $now -300 70 ) { 71 $question_check = true; 72 } 73 } 74 if (!$question_check) { 75 $result = array('error_no' => '103', 'error_msg' => '问答验证没有通过'); 76 show_result($result); 77 } 78 79 // 统一格式化单商品、组合商品的数据结构 80 $nums = $goods = array(); 81 if ('buy_cart' != $action) { 82 $nums = array($goods_num); 83 $goods = array($goods_id); 84 } else { 85 $num = $_POST['num']; 86 $goods = $_POST['goods']; 87 } 88 89 $redis_obj = \common\Datasource::getRedis('instance1'); 90 $d_list = array( 91 'u_trade_' . $uid . '_' . $active_id, 92 'st_a_' . $active_id 93 ); 94 /** 95 * id, sys_status, 96 * num_user, num_left, 97 * price_normal, price_discount 98 */ 99 foreach ($goods as $i => $goods_id) { 100 $d_list[] = 'info_g_' . $goods_id; // 商品详情 101 } 102 $data_list = $redis_obj->mget($d_list); 103 // 4 验证用户是否已经购买 104 if ($data_list[0]) { 105 $result = array('error_no' => '104', 'error_msg' => '请不要重复提交订单'); 106 show_result($result); 107 } 108 // 5 验证活动信息，商品信息是否正常 109 if ($data_list[1]) { 110 $result = array('error_no' => '105', 'error_msg' => '活动信息异常'); 111 show_result($result); 112 } 113 unset($data_list[0]); 114 unset($data_list[1]); 115 /* 116 // 4 验证用户是否已经购买 117 $trade_model = new \model\Trade(); 118 $trade_info = $trade_model->getUserTrade($uid, $active_id); 119 if ($trade_info) { 120 $result = array('error_no' => '104', 'error_msg' => '请不要重复提交订单'); 121 show_result($result); 122 } 123 // 5 验证活动信息，商品信息是否正常 124 $active_info = $active_model->get($active_id); 125 if (!$active_info || $active_info['sys_status'] !== '1' 126 || $active_info['time_begin'] > $now 127 || $active_info['time_end'] < $now 128 ) { 129 $result = array('error_no' => '105', 'error_msg' => '活动信息异常'); 130 show_result($result); 131 } 132 if ('buy_cart' != $action) { 133 $nums = array($goods_num); 134 $goods = array($goods_id); 135 } else { 136 $nums = $_POST['num']; 137 $goods = $_POST['goods']; 138 } 139 */ 140 $num_total = $price_total = $price_discount = 0; 141 $trade_goods = array(); 142 foreach ($data_list as $i => $goods_info) { 143 $goods_num = $nums[$i - 2]; 144 // $goods_info = $goods_model->get($goods_id); 145 if (!$goods_info || $goods_info['sys_status'] !== '1') { 146 $result = array('error_no' => '106', 'error_msg' => '商品信息异常'); 147 show_result($result); 148 } 149 // 6 验证用户购买的商品数量是否在限制的范围内 150 if ($goods_num > $goods_info['num_user']) { 151 $result = array('error_no' => '107', 'error_msg' => '超出商品数量的限制'); 152 show_result($result); 153 } 154 // 7 验证商品是否还有剩余数量 155 if ($goods_info['num_left'] < $goods_num) { 156 $result = array('error_no' => '108', 'error_msg' => '商品剩余数量不足'); 157 show_result($result); 158 } 159 // 8 扣除商品剩余数量 160 $left = $goods_model->changeLeftNumCached($goods_id, 0-$goods_num); 161 $ok = false; 162 if ($left >= 0) { 163 $ok = $goods_model->changeLeftNum($goods_id, 0-$goods_num); 164 } else { 165 // 扣除商品库存失败 166 $goods_model->changeStatusCached($goods_id, 0); 167 $result = array('error_no' => '108', 'error_msg' => '商品剩余数量不足'); 168 show_result($result); 169 } 170 171 172 // 9.1 创建订单信息，订单的商品信息 173 $trade_goods[] = array( 174 'goods_info' => $goods_info, 175 'goods_num' => $goods_num 176 ); 177 $num_total += $goods_num; 178 $price_total += $goods_info['price_normal'] * $goods_num; 179 $price_discount += $goods_info['price_discount'] * $goods_num; 180 } 181 // 9.2 保存订单信息 182 $trade_model = new \model\Trade(); 183 $trade_info = array( 184 'active_id' => $active_id, 185 'goods_id' => $goods_id, 186 'num_total' => $num_total, 187 'num_goods' => count($goods), 188 'price_total' => $price_total, 189 'price_discount' => $price_discount, 190 'goods_info' => json_encode($trade_goods), 191 'uid' => $uid, 192 'username' => $username, 193 'sys_ip' => $client_ip, 194 'sys_dateline' => $now, 195 'time_confirm' => $now, 196 'sys_status' => 1, 197 ); 198 foreach ($trade_info as $k => $v) { 199 $trade_model->$k = $v; 200 } 201 $trade_id = $trade_model->create(); 202 if ($trade_id) { 203 $redis_obj->set('u_trade_' . $uid . '_' . $active_id, 1, 86400); 204 } 205 206 // 10 返回提示信息 207 $result = '秒杀成功，请尽快去支付'; 208 show_result($result, '/trade.php');
