sessions in php

[imran.rajani]

I was trying to append some values in already exists session.

if(isset($_SESSION['ems_id']) == NULL) {
    echo "empty";
    $_SESSION['ems_id'] = "0";
    $_SESSION['ems_amt'] = "0";
             }
  
$ix = count($_SESSION['ems_id']);
$ix++;
 
$_SESSION['ems_id'][5] = strval($rowEms['hs_id']);
$_SESSION['ems_amt'][5] = strval($rowBuy2['hs_ems']);

Its not working
Session stores new data but not populates - Just replacing.

[NogDog]

In the IF block you are assigning scalar values to $_SESSION['ems_id'] and $_SESSION['ems_emt'], so those array elements are not arrays themselves, but you then try to assign array elements to them in the last two lines. I'm not real sure what you want to do, but I'm guessing this might be closer:

if(isset($_SESSION['ems_id']) == NULL) {
    echo "empty";
    $_SESSION['ems_id'] = array();
    $_SESSION['ems_amt'] = array()
}
  
$ix = count($_SESSION['ems_id']);
$ix++;
 
$_SESSION['ems_id'][5] = strval($rowEms['hs_id']);
$_SESSION['ems_amt'][5] = strval($rowBuy2['hs_ems']); 

[dk_zero-cool]

$ix = count($_SESSION['ems_id']);
$ix++; 

A small side remark.
What to you wish to use the $ix for?
If you are going to use it to assign values to the next index in the array, this would be wrong. Arrays starts at 0, but count will return the number of indexes including the first at 0.

If you have an array with 2 indexes, they will be placed at 0 and 1. Count() will return 2, and your $ix will contain 4 instead of 3 which is the next index, because you assign $ix with +1.

[imran.rajani]

In the IF block you are assigning scalar values to $_SESSION['ems_id'] and $_SESSION['ems_emt'], so those array elements are not arrays themselves, but you then try to assign array elements to them in the last two lines. I'm not real sure what you want to do, but I'm guessing this might be closer:

if(isset($_SESSION['ems_id']) == NULL) {
    echo "empty";
    $_SESSION['ems_id'] = array();
    $_SESSION['ems_amt'] = array()
}
  
$ix = count($_SESSION['ems_id']);
$ix++;
 
$_SESSION['ems_id'][5] = strval($rowEms['hs_id']);
$_SESSION['ems_amt'][5] = strval($rowBuy2['hs_ems']); 

Great, I got your point and changed as

if(isset($_SESSION['ems_id']) == NULL) {
echo "empty";
$_SESSION['ems_id'][0] = "0";
$_SESSION['ems_amt'][0] = "0";
}

and it seems working.

Thanks a lot