the+mysql+extension_解决Deprecated: mysql_connect(): The mysql extension is deprecated and will be rem...
时间: 2023-12-14 11:40:08 浏览: 39
这个警告信息是因为在 PHP 5.5.0 版本中,MySQL 扩展已经被弃用,所以在 PHP 7.x 版本中将不再支持使用 MySQL 扩展。你可以考虑使用 MySQLi 或 PDO_MySQL 扩展来代替。
如果你仍然想使用 MySQL 扩展,可以在 php.ini 配置文件中添加下面的代码:
```
[MySQL]
mysql.allow_persistent = Off
mysql.max_persistent = -1
mysql.max_links = -1
mysql.default_port =
mysql.default_socket =
```
这些配置将关闭持久连接,避免使用过多的资源。但是,这并不能解决 MySQL 扩展的弃用问题,建议尽快迁移到 MySQLi 或 PDO_MySQL 扩展。
相关问题
com.mysql.jdbc.Driver'. This is deprecated. The new driver class is
The class 'com.mysql.jdbc.Driver' is a JDBC driver class for connecting to MySQL databases. However, it has been deprecated and is no longer recommended for use. The new driver class for MySQL is 'com.mysql.cj.jdbc.Driver'. This new driver class is part of the Connector/J library, which is the official JDBC driver for MySQL.
The 'com.mysql.cj.jdbc.Driver' class provides improved performance, security, and compatibility with the latest versions of MySQL. It supports features such as SSL/TLS encryption, connection pooling, and handling of time zone conversions.
If you are using an older version of the MySQL JDBC driver in your application, it is recommended to update to the latest version and use the 'com.mysql.cj.jdbc.Driver' class instead. This will ensure that your application can take advantage of the latest features and improvements provided by the new driver.
findDOMNode is deprecated and will be removed in the next major release.
findDOMNode is a method in React that allows you to get a reference to a DOM node that is rendered by a component. However, it has been deprecated and will be removed in the next major release of React.
This means that you should avoid using findDOMNode in your code and instead use other ways to interact with the DOM, such as refs or the useEffect hook. Using findDOMNode can lead to performance issues and can make your code harder to maintain.
If you need to access a DOM node in a component, you can use the useRef hook to create a reference to the node. For example:
```
import { useRef, useEffect } from 'react';
function MyComponent() {
const myRef = useRef(null);
useEffect(() => {
console.log(myRef.current);
}, []);
return <div ref={myRef}>Hello World!</div>;
}
```
In this example, we create a reference to the div element using the useRef hook and then log it to the console using the useEffect hook.
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