How to set .env values in laravel programmatically on the fly

Question

I have a custom CMS that I am writing from scratch in Laravel and want to set env values i.e. database details, mailer details, general configuration, etc from

Answer 1

You can use this custom method i located from internet ,

  /**
 * Calls the method 
 */
public function something(){
    // some code
    $env_update = $this->changeEnv([
        'DB_DATABASE'   => 'new_db_name',
        'DB_USERNAME'   => 'new_db_user',
        'DB_HOST'       => 'new_db_host'
    ]);
    if($env_update){
        // Do something
    } else {
        // Do something else
    }
    // more code
}

protected function changeEnv($data = array()){
        if(count($data) > 0){

            // Read .env-file
            $env = file_get_contents(base_path() . '/.env');

            // Split string on every " " and write into array
            $env = preg_split('/\s+/', $env);;

            // Loop through given data
            foreach((array)$data as $key => $value){

                // Loop through .env-data
                foreach($env as $env_key => $env_value){

                    // Turn the value into an array and stop after the first split
                    // So it's not possible to split e.g. the App-Key by accident
                    $entry = explode("=", $env_value, 2);

                    // Check, if new key fits the actual .env-key
                    if($entry[0] == $key){
                        // If yes, overwrite it with the new one
                        $env[$env_key] = $key . "=" . $value;
                    } else {
                        // If not, keep the old one
                        $env[$env_key] = $env_value;
                    }
                }
            }

            // Turn the array back to an String
            $env = implode("\n", $env);

            // And overwrite the .env with the new data
            file_put_contents(base_path() . '/.env', $env);

            return true;
        } else {
            return false;
        }
    }