


php+mysqli implements batch execution of insert, update and delete data methods, phpmysqli_PHP tutorial
php+mysqli realizes the method of inserting, updating and deleting data in batches, phpmysqli
The example in this article describes the method of inserting, updating and deleting data in batches using php+mysqli. Share it with everyone for your reference. The details are as follows:
mysqli executes insert/update/delete data in batches, the function is multi_query().
The following code only inserts data in batches. In fact, inserting data, updating data, deleting data, etc. can be mixed and executed together. This function is used when querying. Reading data is a little different. Please refer to the following code for details:
<?php //1、创建数据库连接对象 $mysqli = new MySQLi("localhost","root","123456","liuyan"); if($mysqli->connect_error){ die($mysqli->connect_error); } $mysqli->query("set names 'GBK'"); //2、数据插入语句 $sqls = "insert into news(title,contents,datetime,hit) values('去哪儿网架构调整铺垫上市','据接近去哪儿网的消息人士透露,事业部以运营、收入、利润进行考核;新业务部则是以产品运营、商业模式、总亏损进行考核。','".date('Y-m-d H:i:s')."',30);"; $sqls .= "insert into news(title,contents,datetime,hit) values('告诉金主 视频网站谁是NO.1','搜狐说,自己稳稳超过土豆,是行业老二;腾讯说,自己已经超过了优酷,成为行业第一;土豆不承认腾讯的计算方法,坚称自己仍然是亚军;爱奇艺则摆出数据称在单用户观看时长方面排名第一位。','".date('Y-m-d H:i:s')."',30);"; $sqls .= "insert into news(title,contents,datetime,hit) values('苹果正滋生傲慢情绪','据国外媒体报道,没有经历重大挫折的成功往往会让人滋生傲慢。在过去10年中,苹果取得了巨大的成功,成为了音乐播放器和手机市场上的领导者,但却没未遭遇任何较大的挫折。','".date('Y-m-d H:i:s')."',30);"; //3、执行,注意批量执行函数 $res = $mysqli->multi_query($sqls);//返回的是布尔值 //4、判断是否执行成功 if(!$res){ echo "数据插入失败"; }else{ echo "成功!!!"; } //5、关闭连接 $mysqli->close(); ?>
I hope this article will be helpful to everyone’s PHP programming design.

Effective methods to prevent session fixed attacks include: 1. Regenerate the session ID after the user logs in; 2. Use a secure session ID generation algorithm; 3. Implement the session timeout mechanism; 4. Encrypt session data using HTTPS. These measures can ensure that the application is indestructible when facing session fixed attacks.

Implementing session-free authentication can be achieved by using JSONWebTokens (JWT), a token-based authentication system where all necessary information is stored in the token without server-side session storage. 1) Use JWT to generate and verify tokens, 2) Ensure that HTTPS is used to prevent tokens from being intercepted, 3) Securely store tokens on the client side, 4) Verify tokens on the server side to prevent tampering, 5) Implement token revocation mechanisms, such as using short-term access tokens and long-term refresh tokens.

The security risks of PHP sessions mainly include session hijacking, session fixation, session prediction and session poisoning. 1. Session hijacking can be prevented by using HTTPS and protecting cookies. 2. Session fixation can be avoided by regenerating the session ID before the user logs in. 3. Session prediction needs to ensure the randomness and unpredictability of session IDs. 4. Session poisoning can be prevented by verifying and filtering session data.

To destroy a PHP session, you need to start the session first, then clear the data and destroy the session file. 1. Use session_start() to start the session. 2. Use session_unset() to clear the session data. 3. Finally, use session_destroy() to destroy the session file to ensure data security and resource release.

How to change the default session saving path of PHP? It can be achieved through the following steps: use session_save_path('/var/www/sessions');session_start(); in PHP scripts to set the session saving path. Set session.save_path="/var/www/sessions" in the php.ini file to change the session saving path globally. Use Memcached or Redis to store session data, such as ini_set('session.save_handler','memcached'); ini_set(

TomodifydatainaPHPsession,startthesessionwithsession_start(),thenuse$_SESSIONtoset,modify,orremovevariables.1)Startthesession.2)Setormodifysessionvariablesusing$_SESSION.3)Removevariableswithunset().4)Clearallvariableswithsession_unset().5)Destroythe

Arrays can be stored in PHP sessions. 1. Start the session and use session_start(). 2. Create an array and store it in $_SESSION. 3. Retrieve the array through $_SESSION. 4. Optimize session data to improve performance.

PHP session garbage collection is triggered through a probability mechanism to clean up expired session data. 1) Set the trigger probability and session life cycle in the configuration file; 2) You can use cron tasks to optimize high-load applications; 3) You need to balance the garbage collection frequency and performance to avoid data loss.


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