Using variables as array keys

[Tarantulus]

Hi Ladies/Gents/Other

I'm having issues with nested arrays, I need to set an array key by variable but whenever I do I get an error "invalid offset in XXXXX"

here is the code causing the problem

<?php

class cart{
	
	function add($prod_id,$qty,$price) {
		$prod_id=array();
		if (!isset ($_SESSION['cart'])){
			session_start();
			$_SESSION['cart']=array($prod_id);
		}
		if (isset ($_SESSION['cart'][$prod_id])){
			$_SESSION['cart'][$prod_id]['qty'] =+ 1;
		} 
		else{
			$_SESSION['cart'][$prod_id]=$prod_id;
			$_SESSION['cart'][$prod_id]['qty']=1;
			$_SESSION['cart'][$prod_id]['price']=$price;
		}
		print_r($_SESSION['cart'][$prod_id$]);
	}
};

$cart = new cart;

$cart -> add('jfkd',2,22.50);

can someone please point out what I'm doing wrong?

Thank you in advance

[realin]

Hi check out, this piece of code works for me..
you can specify a key to be an array.. A key can be a string or numeric value..
Though u can assign an associate array to a session variable.. like ::
[PHP]$_SESSION["arr"]=$assoc_array;
[/PHP]

Here is the code ::

[PHP]<?php session_start() ;
class cart{

function add($prod_id,$q ty,$price) {

//$prod_id=array( );
if (!isset ($_SESSION['cart'])){
session_start() ;
$_SESSION['cart']=array($prod_id );
}
if (isset ($_SESSION['cart'][$prod_id])){
$_SESSION['cart'][$prod_id]['qty'] =+ 1;
}
else{
$_SESSION['cart'][$prod_id]=$prod_id;
$_SESSION['cart'][$prod_id]['qty']=1;
$_SESSION['cart'][$prod_id]['price']=$price;
}
print_r($_SESSI ON['cart'][$prod_id]);
}
};
$cart = new cart;
$cart -> add('jfkd',2,22 .50);
?>[/PHP]

hope this helps,
cheers !!
Realin !!

[hsriat]

Hi Ladies/Gents/Other

LOL..

I'm having issues with nested arrays, I need to set an array key by variable but whenever I do I get an error "invalid offset in XXXXX"

class cart
{
	
	function add($prod_id,$qty,$price) 
	{
	
		//$prod_id=array(); //reseting the argument?..!! very bad!!
		
		if (!isset ($_SESSION['cart']))
		{

			session_start();
			//just start the session.. nothing else
			//$_SESSION['cart']=array($prod_id);
			
		}
		elseif (!isset($_SESSION['cart'][$prod_id]))
		{
			$_SESSION['cart'][$prod_id] = array("qty"=>1,"price"=>$price);
		}
		else
		{
			$_SESSION['cart'][$prod_id]['qty'] += 1;
			$_SESSION['cart'][$prod_id]['price'] = $price;
		}
		//nothing else
		//else{
		//	$_SESSION['cart'][$prod_id]=$prod_id;
		//	$_SESSION['cart'][$prod_id]['qty']=1;
		//}
		print_r($_SESSION['cart'][$prod_id]);
	}
};

$cart = new cart;

$cart -> add('jfkd',2,22.50);

[Tarantulus]

Thanks a lot guys, works a charm now!

[realin]

Thanks a lot guys, works a charm now!

anytime mayne :)
hope to see you around