How to determine the hostname of MySQL?

How to determine the host name of MySQL?

When using the MySQL database, sometimes we need to determine the host name of the MySQL database to perform the connection operation. Determining the host name of MySQL is actually not complicated. The following will introduce in detail how to determine the host name of MySQL, with code examples.

First of all, we can determine the host name of MySQL in the following ways:

1. Through the configuration file
   The host name of MySQL is usually set in the MySQL configuration file. configuration. In this configuration file, the hostname is usually specified as an IP address or a domain name. We can check the MySQL configuration file to determine the hostname.

MySQL configuration file is usually my.cnf (Linux system) or my.ini (Windows system). Open the file and look for configuration items similar to the following:

[client]
host = localhost

In the above example configuration, host specifies the host name localhost. This configuration tells us that the host name of MySQL is localhost.

2. Through the connection string
   Another way to determine the hostname of MySQL is to look at the connection string used to connect to the database. Hostname information is usually included in the connection string.

For example, the following is an example of PHP code to connect to a MySQL database:

$servername = "localhost";
$username = "root";
$password = "";
$dbname = "mydatabase";

$conn = new mysqli($servername, $username, $password, $dbname);

if ($conn->connect_error) {
    die("连接失败：" . $conn->connect_error);
}
echo "连接成功";

In this connection string, the $servername variable specifies the host name localhost. By looking at a connection string like this, we can also determine that MySQL's hostname is localhost.

3. Through the command line
   We can also determine the host name of MySQL through the command line. When connecting to a MySQL server on the command line, the hostname is specified.

For example, to connect to a MySQL database on the command line, use the following command:

mysql -h localhost -u root -p

In this command, the -h parameter specifies the host name localhost. Through such command line operations, we can also determine that the host name of MySQL is localhost.

Through the above methods, we can determine the host name of MySQL. In actual development, you can choose an appropriate method to determine the host name of MySQL according to the specific situation to facilitate subsequent connection operations.

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