PHP mysqli_select_db() Function

PHP mysqli_select_db() Function is used to choose database for the connection. Also You can select the default database using 4th parameter in mysqli_connect() function.

PHP Version : PHP 5, PHP 7

Syntax for mysqli_select_db:

According to Procedural

mysqli_select_db($connection, $database_name);

According to Object oriented

Example :

<?php
$database_name="test";
$connection = @mysqli_connect("localhost","username","password");
//check connection.
if (mysqli_connect_errno()) {
echo "Failed to connect to MySQL server : " . mysqli_connect_error();
exit();
}
@mysqli_select_db($connection, $database_name); // choose database from mysql server
?>