Predis\Connection\AbstractConnection::connect PHP Method

    public function connect()
    {
        if (!$this->isConnected()) {
            $this->resource = $this->createResource();
            return true;
        }
        return false;
    }

 /**
  * {@inheritdoc}
  */
 public function connect()
 {
     if (parent::connect() && $this->initCommands) {
         foreach ($this->initCommands as $command) {
             $this->executeCommand($command);
         }
     }
 }