Close

In this article, we will focus on the mysqli_close() function in PHP, which is used to close a MySQLi connection. We will provide you with an overview of the function, how it works, and examples of its use.

Introduction to the mysqli_close() function

The mysqli_close() function is a built-in function in PHP that is used to close a MySQLi connection. This function is useful when you need to release resources or when you are done with a specific connection.

How to use the mysqli_close() function

Using the mysqli_close() function is very simple. You just need to call the function on a valid MySQLi object. Here is an example:

<?php
$mysqli = new mysqli("localhost", "username", "password", "database");
if ($mysqli->connect_errno) {
    echo "Failed to connect to MySQL: " . $mysqli->connect_error;
    exit();
}

// execute queries using the connection

$mysqli->close();
?>

In this example, we create a new MySQLi object and connect to a MySQL database with a username and password. We can then execute queries using the connection. Finally, we close the connection by calling the close() function of the MySQLi object.

Advanced usage

The mysqli_close() function can also be used in more advanced scenarios. For example, you can use the function to release resources used by a specific connection or to close multiple connections at once. Here is an example:

<?php
$mysqli1 = new mysqli("localhost", "username", "password", "database1");
$mysqli2 = new mysqli("localhost", "username", "password", "database2");

// execute queries using the connections

$mysqli1->close();
$mysqli2->close();
?>

In this example, we create two new MySQLi objects and connect to two different MySQL databases with different usernames and passwords. We can then execute queries using both connections. Finally, we close both connections by calling the close() function of each MySQLi object.

Conclusion

In conclusion, the mysqli_close() function is a powerful tool for closing MySQLi connections in PHP. By understanding how to use the function and its advanced usage scenarios, you can take advantage of this feature to release resources and create powerful and flexible MySQLi queries in your PHP scripts.