possible to assign db_name(Database.php) in a variable or any other option

Hello guys
We want to connect one of too many databases as a default.
as per user requriment so we want take a database name in a variable or Global variable.

we are unable to use any variable in Database.php file

so guys help me for this problem.

You can pass the database config group to the database method.

So you would need to setup a config group for each database that you need to use.

PHP Code:

$db1 = \Config\Database::connect('group_one');
$db  = \Config\Database::connect('group_two'); 


Note: Change the words “group_one” and “group_two” to the specific group names you are connecting to.

SEE:

Multiple Connections to Same Database

What did you Try? What did you Get? What did you Expect?

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You can also pass the entire connection group to the connect method:

PHP Code:

$custom = [
            'DSN'      => '',
            'hostname' => 'localhost',
            'username' => '',
            'password' => '',
            'database' => '',
            'DBDriver' => 'MySQLi',
            'DBPrefix' => '',
            'pConnect' => false,
            'DBDebug'  => (ENVIRONMENT !== 'production'),
            'cacheOn'  => false,
            'cacheDir' => '',
            'charset'  => 'utf8',
            'DBCollat' => 'utf8_general_ci',
            'swapPre'  => '',
            'encrypt'  => false,
            'compress' => false,
            'strictOn' => false,
            'failover' => [],
            'port'     => 3306,
    ];
$db = \Config\Database::connect($custom); 


One possible solution to make this a "global" is to create a new method in Config\Services.php that determines which is the correct database to connect to for this page view and return a shared instance of the database connection with the appropriate connection. Then, each time you call that method during that load it will return that same database connection.

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