php 数据能够获取 但无法写入数据库 同一文件另一个表可能写入
//session_id(SID);
// session_start();
require_once("../connect/conn_sql.php"); //包含数据库链接文件
if( $_POST["txt_taker"]!="" && $_POST["txt_address"]!="" && $_POST["txt_tel"]!="" && $_POST["txt_paymethod"]!="" ) {
$taker = $_POST["txt_taker"]; //收货人
$address = $_POST["txt_address"]; //收货地址
$tel = $_POST["txt_tel"]; //联系电话
$paymethod = $_POST["txt_paymethod"];//付款方式
$username = $_POST["txt_username"]; //会员名
$pnums = $_POST["txt_pnums"]; //商品数量
$omoney = $_POST["txt_omoney"]; //订单金额
$remark = $_POST["txt_remark"]; //备注
$onum = date('YmdHis').$username; //生成订单号
$createtime = date('Y-m-d H:i:s');; //订单提交日期
$str1 = "insert into tb_order (M_Name,O_Num,P_Nums,O_Money,O_Taker,O_Address,O_Tel,O_Paymethod,O_CreateTime,O_Status,O_Remark)
values('$username','$onum',$pnums,$omoney,'$taker','$address','$tel','$paymethod','$createtime',0,'$remark')";
echo $str1;
$insert1 = mysql_query($str1); //执行SQL语句
echo $insert1; //添加到订单商品详细表
session_start();
$array=explode("@",$_SESSION['producelist']);
$arrayquatity=explode("@",$_SESSION['quatity']);
$s=0;
$i=0;
for($i=0;$i
for($i=0;$i
$sql="select * from tb_product where P_ID =".$pid; $arr = mysql_query($sql); $info=mysql_fetch_array($arr);
$onum = date('YmdHis').$username;
$p_unitprice =$info['P_VPrice'];//单价
$p_nums =$arrayquatity[$i]; //数量
$p_price = $arrayquatity[$i]*$info['P_VPrice']; //小计价格
$str2 = "insert into tb_order_product (O_Num,P_ID,P_UnitPrice,P_Nums,P_Flod,P_Price) values('$onum',$pid,$p_unitprice,$p_nums,1,$p_price)"; $insert2 = mysql_query($str2); //执行SQL语句
}
}
if( $insert1 && $insert2) //如果两张表的数据都插入成功
{
$_SESSION['qk'] = "yes"; //清空购物车
echo "<script>alert('恭喜您,订单提交成功!');window.location.href='../db_zhuyegoujia.php'</script>"; }
else { echo "<script>alert('对不起,订单提交失败!');window.location.href='../db_member_order_add.php'</script>";
}
}
else { echo "<script>alert('请输入带*号的必填信息!');window.location.href='../db_member_order_add.php'</script>";

Reasons for PHPSession failure include configuration errors, cookie issues, and session expiration. 1. Configuration error: Check and set the correct session.save_path. 2.Cookie problem: Make sure the cookie is set correctly. 3.Session expires: Adjust session.gc_maxlifetime value to extend session time.

Methods to debug session problems in PHP include: 1. Check whether the session is started correctly; 2. Verify the delivery of the session ID; 3. Check the storage and reading of session data; 4. Check the server configuration. By outputting session ID and data, viewing session file content, etc., you can effectively diagnose and solve session-related problems.

Multiple calls to session_start() will result in warning messages and possible data overwrites. 1) PHP will issue a warning, prompting that the session has been started. 2) It may cause unexpected overwriting of session data. 3) Use session_status() to check the session status to avoid repeated calls.

Configuring the session lifecycle in PHP can be achieved by setting session.gc_maxlifetime and session.cookie_lifetime. 1) session.gc_maxlifetime controls the survival time of server-side session data, 2) session.cookie_lifetime controls the life cycle of client cookies. When set to 0, the cookie expires when the browser is closed.

The main advantages of using database storage sessions include persistence, scalability, and security. 1. Persistence: Even if the server restarts, the session data can remain unchanged. 2. Scalability: Applicable to distributed systems, ensuring that session data is synchronized between multiple servers. 3. Security: The database provides encrypted storage to protect sensitive information.

Implementing custom session processing in PHP can be done by implementing the SessionHandlerInterface interface. The specific steps include: 1) Creating a class that implements SessionHandlerInterface, such as CustomSessionHandler; 2) Rewriting methods in the interface (such as open, close, read, write, destroy, gc) to define the life cycle and storage method of session data; 3) Register a custom session processor in a PHP script and start the session. This allows data to be stored in media such as MySQL and Redis to improve performance, security and scalability.

SessionID is a mechanism used in web applications to track user session status. 1. It is a randomly generated string used to maintain user's identity information during multiple interactions between the user and the server. 2. The server generates and sends it to the client through cookies or URL parameters to help identify and associate these requests in multiple requests of the user. 3. Generation usually uses random algorithms to ensure uniqueness and unpredictability. 4. In actual development, in-memory databases such as Redis can be used to store session data to improve performance and security.

Managing sessions in stateless environments such as APIs can be achieved by using JWT or cookies. 1. JWT is suitable for statelessness and scalability, but it is large in size when it comes to big data. 2.Cookies are more traditional and easy to implement, but they need to be configured with caution to ensure security.


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