error Undefined offset, how is fix it?

[eluser]John_Betong_002[/eluser]
[quote author="SaSa" date="1312524822"]this way not getting value <input name="date_go">, value is always jgmdate("Y/m/j"). I do not want to be like this[/quote]

Try this first and ensure your input data is what you expect.

If the $_POST data is OK then change TRUE fo FALSE

Code:

if($this->session->userdata('logged_in'))
{
  if(TRUE) // change to FALSE if data is OK
  {
    echo '<pre>';
      print_r($_POST);
    echo '</pre>';
    die;
  }

  $jdate = jgmdate("Y/m/j")