wen php无法连接mysqli怎么办
php无法连接mysqli的解决办法：1、打开“php.ini”文件；2、找到“mysqli.reconnect”；3、将“mysqli.reconnect = OFF”改成“mysqli.reconnect = on”即可。
千万级数据并发如何处理？进入学习
本教程操作环境：windows7系统、PHP8.1版、Dell G3电脑。
php无法连接mysqli怎么办？
PHP连接MySql,解决 ”Uncaught Error: Class ‘mysqli‘ not found“问题
我的PHP是7.4的，但是mysql扩展好像是5以前的，我就只能用mysqli扩展来操作数据库
我看了几十篇回答，我的错误是phpinfo()页面只有一个mysqlnd，没有mysqli，所以网页会报错 ”Uncaught Error: Class ‘mysqli’ not found“
在php.ini里
extension_dir = “ext” 也改成绝对路径了，;extension=php_mysqli.dll前面的 ; 也去掉了，还是不行
最后发现下面这段
[MySQLi] ; Maximum number of persistent links. -1 means no limit. ; http://php.net/mysqli.max-persistent mysqli.max_persistent = -1 ; Allow accessing, from PHP’s perspective, local files with LOAD DATA statements ; http://php.net/mysqli.allow_local_infile ;mysqli.allow_local_infile = On ; Allow or prevent persistent links. ; http://php.net/mysqli.allow-persistent mysqli.allow_persistent = On ; Maximum number of links. -1 means no limit. ; http://php.net/mysqli.max-links mysqli.max_links = -1 ; Default port number for mysqli_connect(). If unset, mysqli_connect() will use ; the $MYSQL_TCP_PORT or the mysql-tcp entry in /etc/services or the ; compile-time value defined MYSQL_PORT (in that order). Win32 will only look ; at MYSQL_PORT. ; http://php.net/mysqli.default-port mysqli.default_port = 3306 ; Default socket name for local MySQL connects. If empty, uses the built-in ; MySQL defaults. ; http://php.net/mysqli.default-socket mysqli.default_socket = ; Default host for mysqli_connect() (doesn’t apply in safe mode). ; http://php.net/mysqli.default-host mysqli.default_host = ; Default user for mysqli_connect() (doesn’t apply in safe mode). ; http://php.net/mysqli.default-user mysqli.default_user = ; Default password for mysqli_connect() (doesn’t apply in safe mode). ; Note that this is generally a bad idea to store passwords in this file. ; Any user with PHP access can run 'echo get_cfg_var(“mysqli.default_pw”) ; and reveal this password! And of course, any users with read access to this ; file will be able to reveal the password as well. ; http://php.net/mysqli.default-pw mysqli.default_pw = ; Allow or prevent reconnect mysqli.reconnect = OFF
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