Help with if statement....

[hoax_monkey]

Hi, what I want the if statement to say is if session customer_id and cart id then.......

The code I tried is below, but obviously it didnt work, can anyone help???
Thanks

 
if (isset($_SESSION['customer_id']) AND ($_SESSION['cart']))  

[hoax_monkey]

Ok I have sorted that out by using &&, now I am looking for an OR function????
If anyone could help I would be grateful!!
Thanks,

 
if (isset($_SESSION['customer_id']) OR ($_SESSION['cart']))

[pablodelapena]

|| (double vertical line)

[azunoman]

Here are all the logical operators (attached as .bmp