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php如何实现取消订单？

coldplay.xixi

Jul 10, 2020 am 10:31 AM

php取消订单

php实现取消订单的方法：首先【order_status】为1时代表客户下单确定；然后为2时代表客户已付款；最后为0时代表订单已取消，运用swoole的异步毫秒定时器。

php如何实现取消订单？

php实现取消订单的方法：

一、业务场景：当客户下单在指定的时间内如果没有付款，那我们需要将这笔订单取消掉，比如好的处理方法是运用延时取消，这里我们用到了swoole，运用swoole的异步毫秒定时器不会影响到当前程序的运行。

二、说明，order_status为1时代表客户下单确定，为2时代表客户已付款，为0时代表订单已取消(正是swoole来做的)，下面的代表我没有用框架，比较纯的PHP代表方便理解和应用

三、举例说明，库存表csdn_product_stock产品ID为1的产品库存数量为20，产品ID为2的库存数量为40，然后客户下单一笔产品ID1减10，产品ID2减20，所以库存表只够2次下单，例子中10秒后自动还原库存，如下图：

图解：

1、第一次下完单产品ID1库存从20减到了10，产品ID2库存从40减到了20；

2、第二次下完单产品ID的库存为0了，产品ID2的库存也为0了；

3、第三次下单时，程序提示Out of stock；

4、过了10秒钟(每个订单下单后往后推10秒)，客户两次下单，由于没有付款(csdn_order表的order_status为1)，产品1和产品2的库存被还原了(csdn_order表的order_status变为0)，客户又可以继续下单了

1、所需要sql数据库表

DROP TABLE IF EXISTS `csdn_order`;
CREATE TABLE `csdn_order` (
  `order_id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `order_amount` float(10,2) unsigned NOT NULL DEFAULT &#39;0.00&#39;,
  `user_name` varchar(64) CHARACTER SET latin1 NOT NULL DEFAULT &#39;&#39;,
  `order_status` tinyint(2) unsigned NOT NULL DEFAULT &#39;0&#39;,
  `date_created` datetime NOT NULL,
  PRIMARY KEY (`order_id`)
) ENGINE=InnoDB AUTO_INCREMENT=0 DEFAULT CHARSET=utf8;
 
DROP TABLE IF EXISTS `csdn_order_detail`;
CREATE TABLE `csdn_order_detail` (
  `detail_id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `order_id` int(10) unsigned NOT NULL,
  `product_id` int(10) NOT NULL,
  `product_price` float(10,2) NOT NULL,
  `product_number` smallint(4) unsigned NOT NULL DEFAULT &#39;0&#39;,
  `date_created` datetime NOT NULL,
  PRIMARY KEY (`detail_id`),
  KEY `idx_order_id` (`order_id`)
) ENGINE=InnoDB AUTO_INCREMENT=0 DEFAULT CHARSET=utf8;
 
DROP TABLE IF EXISTS `csdn_product_stock`;
CREATE TABLE `csdn_product_stock` (
  `auto_id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `product_id` int(10) NOT NULL,
  `product_stock_number` int(10) unsigned NOT NULL,
  `date_modified` datetime NOT NULL,
  PRIMARY KEY (`auto_id`),
  KEY `idx_product_id` (`product_id`)
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8;
 
INSERT INTO `csdn_product_stock` VALUES (&#39;1&#39;, &#39;1&#39;, &#39;20&#39;, &#39;2018-09-13 19:36:19&#39;);
INSERT INTO `csdn_product_stock` VALUES (&#39;2&#39;, &#39;2&#39;, &#39;40&#39;, &#39;2018-09-13 19:36:19&#39;);

2、config.php

<?php
$dbHost = "192.168.0.110";
$dbUser = "root";
$dbPassword = "123";
$dbName = "test";
?>

3、<strong>order_submit.php</strong>

<?php
require("config.php");
try {
$pdo = new PDO("mysql:host=" . $dbHost . ";dbname=" . $dbName, $dbUser, $dbPassword, array(PDO::ATTR_PERSISTENT => true));
$pdo->setAttribute(PDO::ATTR_AUTOCOMMIT, 1);
$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
 
$orderInfo = array(
&#39;order_amount&#39; => 10.92,
&#39;user_name&#39; => &#39;yusan&#39;,
&#39;order_status&#39; => 1,
&#39;date_created&#39; => &#39;now()&#39;,
&#39;product_lit&#39; => array(
0 => array(
&#39;product_id&#39; => 1,
&#39;product_price&#39; => 5.00,
&#39;product_number&#39; => 10,
&#39;date_created&#39; => &#39;now()&#39;
),
1 => array(
&#39;product_id&#39; => 2,
&#39;product_price&#39; => 5.92,
&#39;product_number&#39; => 20,
&#39;date_created&#39; => &#39;now()&#39;
)
)
);
 
try{
$pdo->beginTransaction();//开启事务处理
 
$sql = &#39;insert into csdn_order (order_amount, user_name, order_status, date_created) values (:orderAmount, :userName, :orderStatus, now())&#39;;
$stmt = $pdo->prepare($sql);  
$affectedRows = $stmt->execute(array(&#39;:orderAmount&#39; => $orderInfo[&#39;order_amount&#39;], &#39;:userName&#39; => $orderInfo[&#39;user_name&#39;], &#39;:orderStatus&#39; => $orderInfo[&#39;order_status&#39;]));
$orderId = $pdo->lastInsertId();
if(!$affectedRows) {
throw new PDOException("Failure to submit order!");
}
foreach($orderInfo[&#39;product_lit&#39;] as $productInfo) {
 
$sqlProductDetail = &#39;insert into csdn_order_detail (order_id, product_id, product_price, product_number, date_created) values (:orderId, :productId, :productPrice, :productNumber, now())&#39;;
$stmtProductDetail = $pdo->prepare($sqlProductDetail);  
$stmtProductDetail->execute(array(&#39;:orderId&#39; => $orderId, &#39;:productId&#39; =>  $productInfo[&#39;product_id&#39;], &#39;:productPrice&#39; => $productInfo[&#39;product_price&#39;], &#39;:productNumber&#39; => $productInfo[&#39;product_number&#39;]));
 
$sqlCheck = "select product_stock_number from csdn_product_stock where product_id=:productId";  
$stmtCheck = $pdo->prepare($sqlCheck);  
$stmtCheck->execute(array(&#39;:productId&#39; => $productInfo[&#39;product_id&#39;]));  
$rowCheck = $stmtCheck->fetch(PDO::FETCH_ASSOC);
if($rowCheck[&#39;product_stock_number&#39;] < $productInfo[&#39;product_number&#39;]) {
throw new PDOException("Out of stock, Failure to submit order!");
}
 
 
$sqlProductStock = &#39;update csdn_product_stock set product_stock_number=product_stock_number-:productNumber, date_modified=now() where product_id=:productId&#39;;
$stmtProductStock = $pdo->prepare($sqlProductStock);  
$stmtProductStock->execute(array(&#39;:productNumber&#39; => $productInfo[&#39;product_number&#39;], &#39;:productId&#39; => $productInfo[&#39;product_id&#39;]));
$affectedRowsProductStock = $stmtProductStock->rowCount();
 
//库存没有正常扣除，失败，库存表里的product_stock_number设置了为非负数
//如果库存不足时，sql异常：SQLSTATE[22003]: Numeric value out of range: 1690 BIGINT UNSIGNED value is out of range in &#39;(`test`.`csdn_product_stock`.`product_stock_number` - 20)&#39;
if($affectedRowsProductStock <= 0) {
throw new PDOException("Out of stock, Failure to submit order!");
}
}
echo "Successful, Order Id is：" . $orderId ."，Order Amount is：" . $orderInfo[&#39;order_amount&#39;] . "。";
$pdo->commit();//提交事务
//exec("php order_cancel.php -a" . $orderId . " &");
pclose(popen(&#39;php order_cancel.php -a &#39; . $orderId . &#39; &&#39;, &#39;w&#39;));
//system("php order_cancel.php -a" . $orderId . " &", $phpResult);
//echo $phpResult;
}catch(PDOException $e){
echo $e->getMessage();
$pdo->rollback();
}
$pdo = null;
} catch (PDOException $e) {
    echo $e->getMessage();
}
?>

4、<strong>order_cancel.php</strong>

<?php
require("config.php");
$queryString = getopt(&#39;a:&#39;);
$userParams = array($queryString);
appendLog(date("Y-m-d H:i:s") . "\t" . $queryString[&#39;a&#39;] . "\t" . "start");
 
try {
$pdo = new PDO("mysql:host=" . $dbHost . ";dbname=" . $dbName, $dbUser, $dbPassword, array(PDO::ATTR_PERSISTENT => true));
$pdo->setAttribute(PDO::ATTR_AUTOCOMMIT, 0);
$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
 
swoole_timer_after(10000, function ($queryString) {
global $queryString, $pdo;
 
try{
$pdo->beginTransaction();//开启事务处理
 
$orderId = $queryString[&#39;a&#39;];  
$sql = "select order_status from csdn_order where order_id=:orderId";  
$stmt = $pdo->prepare($sql);  
$stmt->execute(array(&#39;:orderId&#39; => $orderId));  
$row = $stmt->fetch(PDO::FETCH_ASSOC);
//$row[&#39;order_status&#39;] === "1"代表已下单，但未付款，我们还原库存只针对未付款的订单
if(isset($row[&#39;order_status&#39;]) && $row[&#39;order_status&#39;] === "1") {
$sqlOrderDetail = "select product_id, product_number from csdn_order_detail where order_id=:orderId";  
$stmtOrderDetail = $pdo->prepare($sqlOrderDetail);  
$stmtOrderDetail->execute(array(&#39;:orderId&#39; => $orderId));  
while($rowOrderDetail = $stmtOrderDetail->fetch(PDO::FETCH_ASSOC)) {
$sqlRestoreStock = "update csdn_product_stock set product_stock_number=product_stock_number + :productNumber, date_modified=now() where product_id=:productId";  
$stmtRestoreStock = $pdo->prepare($sqlRestoreStock);
$stmtRestoreStock->execute(array(&#39;:productNumber&#39; => $rowOrderDetail[&#39;product_number&#39;], &#39;:productId&#39; => $rowOrderDetail[&#39;product_id&#39;]));
}
 
$sqlRestoreOrder = "update csdn_order set order_status=:orderStatus where order_id=:orderId";  
$stmtRestoreOrder = $pdo->prepare($sqlRestoreOrder);
$stmtRestoreOrder->execute(array(&#39;:orderStatus&#39; => 0, &#39;:orderId&#39; => $orderId));
}
 
$pdo->commit();//提交事务
}catch(PDOException $e){
echo $e->getMessage();
$pdo->rollback();
}
$pdo = null;
 
appendLog(date("Y-m-d H:i:s") . "\t" . $queryString[&#39;a&#39;] . "\t" . "end\t" . json_encode($queryString));
}, $pdo);
 
} catch (PDOException $e) {
echo $e->getMessage();
}
function appendLog($str) {
$dir = &#39;log.txt&#39;;
$fh = fopen($dir, "a");
fwrite($fh, $str . "\n");
fclose($fh);
}
?>