How to set connection variable with specific file in codeigniter?

@kadin 

To set a connection variable with a specific file in CodeIgniter, you can use the config file which is located in the application/config folder.

Here's a step-by-step guide to set a connection variable with a specific file in CodeIgniter:

1. Locate the config file: Open the application/config folder in your CodeIgniter project directory.
2. Create a new config file (if necessary): If you want to set connection variables for a specific file, you can create a new config file (e.g., database_config.php) in the config folder.
3. Define the connection variable: In the new config file, define the connection variable you want to set. For example, if you want to set a database connection variable, you can define it like this:

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$config['database_host'] = 'localhost';
$config['database_user'] = 'root';
$config['database_password'] = 'password';
$config['database_name'] = 'my_database';

1. Load the config file: In your controller or model where you want to use the connection variable, load the config file using the following code:

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$this->config->load('database');

1. Get the connection variable: Once the config file is loaded, you can access the connection variable using the following code:

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$database_host = $this->config->item('database_host');
$database_user = $this->config->item('database_user');
$database_password = $this->config->item('database_password');
$database_name = $this->config->item('database_name');

By following these steps, you can set a connection variable with a specific file in CodeIgniter.