How to Use the mysql_get_server_info Function to Retrieve MySQL Server Storage Engine Type, such as MyISAM or InnoDB?

What is mysqli::character_set_name? mysqli::character_set_name is a method in PHP's mysqli extension that returns the character set name used by the current database connection. The prototype of this method is as follows:

How to Use mysqli::$client_version to Retrieve and Verify MySQL Client Version Information?

When using PHP for MySQL database operations, developers usually pay more attention to the query results themselves, such as the number of rows returned or whether the execution is successful, and it is easy to ignore a useful debugging tool - the mysqli::$info attribute. After some types of SQL statements are executed, this property can return more statistics about the execution results, helping us to understand the impact of a query more comprehensively.

When using PHP’s mysqli extension to connect to a MySQL database, connection failures are quite common. Typically, we check the connection error code and message to determine the root cause. However, sometimes we also want to retrieve some server information—like the MySQL server version—to assist in diagnosis.

Getting query results is a common and important step when interacting with MySQL using PHP. mysql_fetch_array() is a function used in PHP to obtain query results. It can return the results as an associative array, a numeric index array, or both, so that we can process them in subsequent programs.

In PHP, when performing network programming, the socket_addrinfo_connect function and the socket_write function are two very useful tools. The socket_addrinfo_connect function is used to connect to the target server through an address information structure (addrinfo), while socket_write is used to write data to an established socket connection. This article will introduce how to use these two functions together to send data, along with a simple example code.

The mysqli extension provides rich interfaces for operating MySQL databases, where the mysqli::get_warnings function is used to obtain warning information generated by the latest database operation. Although this function performs well in MySQL 5.6 and above, there are some differences in compatibility and performance in different versions of MySQL, and developers may encounter problems when using it. This article will introduce the compatibility issues of mysqli::get_warnings in detail and provide corresponding solutions.