isset() on codeigniter objects

you don't need isset(); cause CI methods returns false or true

just do

 if($this->session->flashdata()){ }

and your error is cause you are surely not loading the session library:

so do this:

   $this->load->library('session');if($this->session->flashdata()){ }

if you prefer (i preferr) you can autoload the session library changing this in your config/autoload.php file:

$autoload['libraries'] = array('session');

so now you don't have to load anytime the session library cause CI autoloads that for you

codeigniter session object isset

You can check the existence of $this->session first

if (isset($this->session) && isset($this->session->flashdata('user_profile'))) {}

codeigniter session object isset

For proper validation you must do this method. Weather the values becomes NULL sometimes.

$sessusr=$this->session->userdata('username');  if(isset($sessusr) && trim($sessusr!='')) {//to do }

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