


There is already a mysqli extension in phpinfo, but it still cannot be used and reports mysqli not found. How to solve it?
phpinfo has displayed the relevant expansion information of mysqli
But when executing php xxx.php from the command line, it still reports mysqli not found
video_order.php code:
video_order.php is a script file, so I want to test it on the command line. How to solve it? Waiting online

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MySQL is suitable for beginners because it is simple to install, powerful and easy to manage data. 1. Simple installation and configuration, suitable for a variety of operating systems. 2. Support basic operations such as creating databases and tables, inserting, querying, updating and deleting data. 3. Provide advanced functions such as JOIN operations and subqueries. 4. Performance can be improved through indexing, query optimization and table partitioning. 5. Support backup, recovery and security measures to ensure data security and consistency.

Linux is widely used in servers, embedded systems and desktop environments. 1) In the server field, Linux has become an ideal choice for hosting websites, databases and applications due to its stability and security. 2) In embedded systems, Linux is popular for its high customization and efficiency. 3) In the desktop environment, Linux provides a variety of desktop environments to meet the needs of different users.

Create a database using Navicat Premium: Connect to the database server and enter the connection parameters. Right-click on the server and select Create Database. Enter the name of the new database and the specified character set and collation. Connect to the new database and create the table in the Object Browser. Right-click on the table and select Insert Data to insert the data.

Frequently asked questions and answers to CentOS interview include: 1. Use the yum or dnf command to install software packages, such as sudoyumininstallnginx. 2. Manage users and groups through useradd and groupadd commands, such as sudouseradd-m-s/bin/bashnewuser. 3. Use firewalld to configure the firewall, such as sudofirewall-cmd--permanent-add-service=http. 4. Set automatic updates to use yum-cron, such as sudoyumininstallyum-cron and configure apply_updates=yes.

You can create a new MySQL connection in Navicat by following the steps: Open the application and select New Connection (Ctrl N). Select "MySQL" as the connection type. Enter the hostname/IP address, port, username, and password. (Optional) Configure advanced options. Save the connection and enter the connection name.

Common errors and solutions when connecting to databases: Username or password (Error 1045) Firewall blocks connection (Error 2003) Connection timeout (Error 10060) Unable to use socket connection (Error 1042) SSL connection error (Error 10055) Too many connection attempts result in the host being blocked (Error 1129) Database does not exist (Error 1049) No permission to connect to database (Error 1000)

Common reasons why Navicat cannot connect to the database and its solutions: 1. Check the server's running status; 2. Check the connection information; 3. Adjust the firewall settings; 4. Configure remote access; 5. Troubleshoot network problems; 6. Check permissions; 7. Ensure version compatibility; 8. Troubleshoot other possibilities.

To connect to a local MySQL database using Navicat: Create a connection and set the connection name, host, port, username, and password. Test the connection to make sure the parameters are correct. Save the connection. Select a new connection from the connection list. Double-click the database you want to connect to.
