code: public function exec($keepAlive = false)
  	{
  		$this->lastResult	= curl_exec($this->curl);
  		$this->info			= curl_getinfo($this->curl);
  
  		// Close session
  		if (!$keepAlive) curl_close($this->curl);
  
  		return $this->lastResult !== false;
  	}
docs: Execute and close session
  
  @param bool $keepAlive if true the session will not be closed
  
  @return bool false if execution failed, true otherwise