code: public function getConnection()
      {
          if (!($this->log instanceof Log)) {
              $this->log = new Log('DB');
          }
  
          // Use cached connection if already connected to server
          if ($this->connection instanceof \PDO) {
              return $this->connection;
          }
  
          $this->log->report('Connecting to database...');
  
          try{
              $this->connection = new \PDO($this->generateDSN(), $this->user, $this->password);
              $this->log->report('Connected to database.');
          } catch ( \PDOException $e ){
              $this->log->error('Failed to connect to database, [SQLSTATE] ' . $e->getCode());
          }
  
          // Check is the connection to server succeed
          if ($this->connection instanceof \PDO) {
              return $this->connection;
          } else {
              // There was an error connecting to the DB server
              return false;
          }
      }
docs: Gets the connecting to the database
  Check if the database connection exists if not connects to the database
  
  @return \PDO | bool